{"id":6397,"date":"2022-11-14T00:26:00","date_gmt":"2022-11-14T00:26:00","guid":{"rendered":"http:\/\/www.backroadswest.com\/blog\/kaiparowits-plateau-road-trip-copy\/"},"modified":"2026-09-09T16:58:07","modified_gmt":"2026-09-09T16:58:07","slug":"san-andreas-fault-in-san-bernardino","status":"publish","type":"post","link":"https:\/\/www.backroadswest.com\/blog\/san-andreas-fault-in-san-bernardino\/","title":{"rendered":"San Andreas Fault in San Bernardino"},"content":{"rendered":"<!--themify_builder_content-->\n<div id=\"themify_builder_content-6397\" data-postid=\"6397\" class=\"themify_builder_content themify_builder_content-6397 themify_builder tf_clear\">\n                    <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_tfjj567 tb_first tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_2 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col3-2 tb_5he3567 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_4hck568    wow\" data-tf-animation=\"zoomIn\" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p><strong>Along with our other road trips along California\u2019s San Andreas Fault, this tour takes us through the streets of San Bernardino, Highland, Yucaipa and Oak Glen, which are all cities within the region known as the Inland Empire east of Los Angeles.<\/strong> Similar to our tour of the San Francisco Peninsula showcasing the San Andreas, this tour passes through a populated area and reveals how homes are built next to and on top of the fault zone. Although it\u2019s possible to see many fault features in this tour, such as sag ponds and fault scarps, many have been erased by land development.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column tb-column col3-1 tb_65zn568 last\">\n                    <!-- module image -->\n<div  class=\"module module-image tb_v2n8568 image-top rounded drop-shadow  tf_mw wow\" data-tf-animation=\"fadeInRightBig\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdo.jpg\" width=\"300\" height=\"218\" title=\"San Andreas Fault in San Bernardino\" alt=\"San Andreas Fault in San Bernardino\">    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_t63p567 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_2v5s569 first\">\n                    <!-- module callout -->\n<div  class=\"module ui module-callout tb_gcs8569 button-bottom-center red  rounded embossed shadow wow\" data-tf-animation=\"fadeInLeft\" data-tf-animation_delay=\"1\" data-lazy=\"1\">\n    \n    <div class=\"callout-inner\">\n    <div class=\"callout-content tf_left\">\n        <h3 class=\"callout-heading\"><\/h3>\n        <div class=\"tb_text_wrap\">\n            <strong>Click image<\/strong> to watch Virtual Video Tour and see viewer comments.\nThen come back to get the rest of the story.        <\/div>\n    <\/div>\n    <!-- \/callout-content -->\n        <\/div>\n    <!-- \/callout-content -->\n<\/div>\n<!-- \/module callout -->\n<!-- module image -->\n<div  class=\"module module-image tb_9gu1569 image-center bordered  tf_mw wow\" data-tf-animation=\"lightSpeedIn\" data-tf-animation_delay=\"1.5\" data-lazy=\"1\">\n        <div class=\"image-wrap tf_rel tf_mw\">\n            <a href=\"https:\/\/www.youtube.com\/watch?v=uNKpsOTUqXY\" rel=\"noopener\" target=\"_blank\">\n                   <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoYouTube.jpg\" width=\"723\" height=\"407\" title=\"San Andreas Fault in San Bernardino\" alt=\"San Andreas Fault in San Bernardino\">        <\/a>\n    \n        <\/div>\n    <!-- \/image-wrap -->\n    \n        <\/div>\n<!-- \/module image --><!-- module text -->\n<div  class=\"module module-text tb_u2tg569   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h3>Trip Specs<\/h3>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_m4hi567 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_2 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_bx3h570 first\">\n                    <!-- module callout -->\n<div  class=\"module ui module-callout tb_5r7x570  yellow  rounded shadow wow\" data-tf-animation=\"fadeInUp\" data-lazy=\"1\">\n    \n    <div class=\"callout-inner\">\n    <div class=\"callout-content tf_left\">\n        <h3 class=\"callout-heading\">Length<\/h3>\n        <div class=\"tb_text_wrap\">\n            About 50 miles one-way        <\/div>\n    <\/div>\n    <!-- \/callout-content -->\n        <\/div>\n    <!-- \/callout-content -->\n<\/div>\n<!-- \/module callout -->\n<!-- module callout -->\n<div  class=\"module ui module-callout tb_3si1570  yellow  rounded shadow wow\" data-tf-animation=\"fadeInUp\" data-lazy=\"1\">\n    \n    <div class=\"callout-inner\">\n    <div class=\"callout-content tf_left\">\n        <h3 class=\"callout-heading\">Attractions<\/h3>\n        <div class=\"tb_text_wrap\">\n            <ul>\n<li>Fault features<\/li>\n<li>Homes built on San Andreas<\/li>\n<\/ul>        <\/div>\n    <\/div>\n    <!-- \/callout-content -->\n        <\/div>\n    <!-- \/callout-content -->\n<\/div>\n<!-- \/module callout -->\n        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_6c5i570 last\">\n                    <!-- module callout -->\n<div  class=\"module ui module-callout tb_4m4n570  yellow  rounded shadow wow\" data-tf-animation=\"fadeInUp\" data-lazy=\"1\">\n    \n    <div class=\"callout-inner\">\n    <div class=\"callout-content tf_left\">\n        <h3 class=\"callout-heading\">Difficulty<\/h3>\n        <div class=\"tb_text_wrap\">\n            <ul>\n<li>Easy<\/li>\n<li>See <a href=\"#PlacesWeVisit\">Places We Visit<\/a><\/li>\n<\/ul>        <\/div>\n    <\/div>\n    <!-- \/callout-content -->\n        <\/div>\n    <!-- \/callout-content -->\n<\/div>\n<!-- \/module callout -->\n<!-- module callout -->\n<div  class=\"module ui module-callout tb_duyf570  yellow  rounded shadow wow\" data-tf-animation=\"fadeInUp\" data-lazy=\"1\">\n    \n    <div class=\"callout-inner\">\n    <div class=\"callout-content tf_left\">\n        <h3 class=\"callout-heading\">Elevation Gain<\/h3>\n        <div class=\"tb_text_wrap\">\n            Low point 1,600 feet elevation\nHigh point 4,800 feet        <\/div>\n    <\/div>\n    <!-- \/callout-content -->\n        <\/div>\n    <!-- \/callout-content -->\n<\/div>\n<!-- \/module callout -->\n        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_rx1i567 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_cvu9570 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_thgr571   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p>For those that have watched the virtual video tour above, reading this blog post will give you more insight into this segment of the San Andreas Fault. It also explains the touring route as well as more details about each stop that we\u2019ll visit.<\/p>\n<p>See the <a href=\"#TripMap\">Trip Map<\/a> for an interactive map of our touring route and a link to download the GPX file we created containing the waypoints for plotting onto Gaia GPS the places we visit. Using Gaia GPS\u2019s <em>Bedrock Geology<\/em> layer plots the path of the San Andreas, making it easy to find many of the features described in this tour.<\/p>\n<h2>Fault Terminology<\/h2>\n<p>Throughout this tour, we\u2019ll be visiting places where we can see signs of the San Andreas Fault. Those \u201csigns\u201d are what we call \u201cfault features\u201d. Here are some of those features explained.<\/p>\n<p>Keep in mind that the San Andreas isn\u2019t just a regular fault like many others, it is a significantly large fault. It\u2019s actually a <em>plate boundary<\/em> \u2013 the boundary between the North American Plate and the Pacific Plate. Both of these plates are experiencing what\u2019s called <em>continental drift<\/em> and are literally sliding past (or rubbing against) each other very, very slowly. This edge or division between the two plates is the San Andreas Fault. Earthquakes occur when that sliding turns into a sudden jerk of movement. Explaining further involves a lengthy discussion of <em>plate tectonics<\/em>, which is out of scope of this article. Learn more by Googling \u201cplate tectonics\u201d.<\/p>\n<p>The San Andreas is also a type of fault known as a <em>right-lateral strike-slip fault<\/em>. That means, if you are standing on one side of the fault and looking towards the other side, the land on the other side of the fault would be moving to the right. That means, the land on the Pacific Plate, which would include the Los Angeles area, is moving northwest. The land on the North American Plate, including the San Bernardino Mountains and Mojave Desert to the north, is either stationary or moving very slowly to the southeast.<\/p>\n<div class=\"g g-11\"><div class=\"g-single a-26\"><a class=\"gofollow\" data-track=\"MjYsMTEsNjA=\" title=\"Snap Shots West\" href=\"http:\/\/www.backroadswest.com\/ssw\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\" size-medium wp-image-2382 aligncenter\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2021\/01\/Ad-800x500-bw2.gif\" width=\"800\" height=\"500\" \/><\/a><\/div><\/div>\n<p>The fault isn\u2019t always a single line or deep \u201ccrack\u201d in the ground dividing the two plates. It can also be a \u201cfault zone\u201d. This zone can be anywhere from a hundred feet thick to a half mile across. These zones consist of many factures that are all related to each other. In some places on our tour, the fault is not more than 50 feet wide. In other places, it\u2019s just under a quarter of a mile wide.<\/p>\n<p>Here are some of the fault features we\u2019ll see in this tour:<\/p>\n<ul>\n<li><strong>Fault scarp:<\/strong> an abrupt and straight edge, like a step in the contour of the land<\/li>\n<li><strong>Shutter ridge:<\/strong> a straight and shallow trough in the ground<\/li>\n<li><strong>Sag pond:<\/strong> a low depression where water is trapped by the fault\u2019s impermeable barrier of crushed earth material and begins ponding<\/li>\n<li><strong>Linear valley:<\/strong> a long and skinny valley created by a significant strike-slip fault like the San Andreas \u2013 on this tour, we\u2019ll constantly be looking at Lone Pine Valley for reference, which is a linear valley<\/li>\n<\/ul>\n<figure id=\"attachment_6388\" aria-describedby=\"caption-attachment-6388\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr3.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6388\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr3.jpg\" alt=\"Shutter ridge near Oak Glen\" width=\"800\" height=\"450\" srcset=\"https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr3.jpg 800w, https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr3-300x169.jpg 300w, https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr3-768x432.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><figcaption id=\"caption-attachment-6388\" class=\"wp-caption-text\">Arrows point out shutter ridges along Yucaipa Ridge Rd<\/figcaption><\/figure>\n<p>Both scarps and shutter ridges were either created during an earthquake event or by slow movement along the fault, known as <em>fault creep<\/em>. Some scarps were created during earthquakes that occurred a few hundred years ago and still look like an abrupt step in the landscape. Other scarps are from earthquakes possibly thousands of years ago and are difficult to make out because natural erosion is slowly erasing them.<\/p>\n<p>The challenge on this particular tour, which passes through a lot of developed land, will be to find those features. A lot of land was bulldozed and leveled to make way for development, which erased some of these fault features. However, in the first half of the tour, the fault passes over undeveloped mountains, revealing a lot of features. The second part of the tour passes through developed areas and features can only be seen in certain areas.<\/p>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_avxh571   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- Skyscraper160x600 --><br \/>\n<ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"8100341909\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_84kj571   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h2>Trip Route<\/h2>\n<p>Our tour of this segment of the San Andreas Fault begins in the quaint town of Oak Glen and ends in the small community of Devore at the foot of the Cajon Pass. Since the fault hugs the southern edge or base of the San Bernardino Mountains, our touring route will essentially follow this edge. After starting in Oak Glen, we\u2019ll pass through the towns of Yucaipa, Highland and San Bernardino, then ending in Devore.<\/p>\n<p>Unlike most of our other tours that follow a route of one to five roads, this tour will be difficult to follow as it wonders down many different streets making many turns. For that reason, rather than provide left and right directions like we do on our other tours, with this tour, we\u2019ll provide a list of addresses or placenames that you can navigate to, using your favorite navigation app like Google Maps.<\/p>\n<h4>Oak Glen &amp; Yucaipa<\/h4>\n<p>Beginning in Oak Glen at the intersection of Oak Glen Road and Glen Road, we\u2019ll begin heading west or downhill. For the next 2-3 miles, the road will zig-zag and pass within a hundred feet of the fault and, a few times, the road crosses it. Here, the fault will be on the right (the mountain side) and, in some places, be just behind buildings.<\/p>\n<p>From here, way in the distance, we can see where our tour ends in Devore and, just behind Devore, we can easily spot Lone Pine Canyon, which is a linear valley next to the Cajon Pass. This is where our other San Andreas tour starts that passes through Wrightwood and over the San Gabriel Mountains. Lone Pine Canyon is about 40 miles away from here.<\/p>\n<p>We\u2019ll continue on Oak Glen Road down into Yucaipa and turn right (north) onto Bryant Street. We\u2019ll head up Yucaipa Ridge Road to view both a sag pond and a shutter ridge that sit on top of the fault. From this point, we\u2019ll also get a view of the fault and where we came from in Oak Glen.<\/p>\n<p>Take note that in late September 2022, heavy rains caused a series of large mudslides that damaged many of the homes and businesses along this stretch of Oak Glen Road. The road was actually closed for two months after the mudslides. Fires from the previous years burned vegetation that keep soils in place. Without the vegetation, rushing water will easily pickup and carry topsoil and ash down the steep slopes, which is a common theme all along this tour from Oak Glen to Devore. The communities of Devore and Highland have also suffered from massive mud and landslides following large rainstorms months or years after wildfires scared the mountains above.<\/p>\n<p>The steep topography of the mountains, coupled with the adjacent gradual slopes where these communities were built, is a product of the San Andreas Fault itself. Evidence of past erosion shows that mudslides and floods from the steep mountainsides above have been occurring all along this tour route for centuries. Not only are these mudslides the fault of a deluging downpour, it\u2019s also the San Andreas\u2019 fault (pun intended) for creating these steep slopes.<\/p>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_m8na891   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/><!-- Skyscraper160x600 --><br \/><ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"8100341909\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/><script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_ihia969   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h4>Hwy 38 &amp; Mill Creek<\/h4>\n<p>Next, we\u2019ll head up Hwy 38 a short distance to where the fault crosses the road, as well as the large drainage of Mill Creek. There\u2019s little trace of the fault here other than possibly a few shutter ridges. Any trace of the fault was covered by the massive amounts of alluvium (boulders and gravel) that have flowed out of the canyon.<\/p>\n<p>We\u2019ll now head down (west) Hwy 38 as we travel away from the fault. After a few miles, we turn right onto Garnet Street, which turns into Greenspot Road. In the distance, we\u2019ll see the massive Seven Oaks Dam. When we pan our eyes to the left, we\u2019ll see a long stretch of the fault along the base of the mountains all the way to Lone Pine Canyon, which is now about 25 \u201ccrow fly\u201d miles away.<\/p>\n<p>Along this stretch of road, similar to what we saw along Hwy 38 a short distance back, we\u2019ll cross over a large alluvial plain. This is a larger field of alluvium that has flowed out of the San Bernardino Mountains for a very long period of time. It has covered up any trace of the fault here, so no fault features will be visible here.<\/p>\n<h4>Greenspot Bridge &amp; Seven Oaks Dam<\/h4>\n<p>Just before the road crosses the Santa Ana River, there will be a parking area and trailhead on the right. Park here and walk towards the dam on the paved bicycle path. This trail will take you over the historic Greenspot Bridge.<\/p>\n<p>Built in 1912, the Greenspot Bridge actually began its life in Victorville, in the Mojave Desert 30 miles north of here, to span the Mojave River. When a wider bridge was needed, this bridge was moved and installed here in 1933. When traveling this road up until recently, this is the bridge you drove over and hoped there was no wide vehicle coming from the other direction! The name, Greenspot, came from an old hotel that was in Victorville. The newer bridge, that the main road uses, was built in 2015. As you walk over the bridge, be sure to read the numerous kiosk signs located around the bridge. However, none of the kiosks mention that you are standing on top of the infamous San Andreas Fault.<\/p>\n<p>In this area where the bridge sits on top of the fault zone, one might wonder why a large dam was built here? Plus, the dam was built just recently (late 1990s). Seven Oaks Dam, which is one of the largest earth-filled dams in the USA, is designed specifically to withstand shocks from the nearby San Andreas. The dam is so thick that it would be impossible to cause it to fracture. Compared to Hoover Dam, which is tall, skinny, and composed of concrete, could fracture and fail if it were hit with a 8.0 magnitude earthquake.<\/p>\n<p>More&#8230;<\/p>\n<div class=\"g g-4\"><div class=\"g-single a-12\"><a title=\"BackRoadsWest Travel Guides\" href=\"http:\/\/www.backroadswest.com\/brw\/mojave-national-preserve\/\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\" size-medium wp-image-2382 aligncenter\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/05\/AdMNP3.gif\" width=\"665\" height=\"200\" \/><\/a><\/div><\/div>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_tjgy604   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h3>Support Us<\/h3>\n<p style=\"text-align: left;\">Help us fill up our tank with gas for our next trip by donating $5 and we&#8217;ll bring you back more quality virtual tours of our trips!<\/p>\n<p style=\"text-align: left;\">Your credit card payment is safe and easy using PayPal. Click the [Donate] button to get started:<\/p>\n<p style=\"text-align: center;\"><!-- Begin PayPal Donations by https:\/\/www.tipsandtricks-hq.com\/paypal-donations-widgets-plugin -->\n\n<form action=\"https:\/\/www.paypal.com\/cgi-bin\/webscr\" method=\"post\">\n    <div class=\"paypal-donations\">\n        <input type=\"hidden\" name=\"cmd\" value=\"_donations\" \/>\n        <input type=\"hidden\" name=\"bn\" value=\"TipsandTricks_SP\" \/>\n        <input type=\"hidden\" name=\"business\" value=\"ilene@backroadswest.com\" \/>\n        <input type=\"hidden\" name=\"return\" value=\"http:\/\/www.backroadswest.com\/blog\" \/>\n        <input type=\"hidden\" name=\"item_name\" value=\"Help fund our travel cost to create more trips\" \/>\n        <input type=\"hidden\" name=\"item_number\" value=\"BackRoadsWest Blog Donation\" \/>\n        <input type=\"hidden\" name=\"amount\" value=\"5.00\" \/>\n        <input type=\"hidden\" name=\"rm\" value=\"0\" \/>\n        <input type=\"hidden\" name=\"currency_code\" value=\"USD\" \/>\n        <input type=\"image\" style=\"cursor: pointer;\" src=\"https:\/\/www.paypalobjects.com\/en_US\/i\/btn\/btn_donateCC_LG.gif\" name=\"submit\" alt=\"PayPal - The safer, easier way to pay online.\" \/>\n        <img loading=\"lazy\" decoding=\"async\" alt=\"\" src=\"https:\/\/www.paypalobjects.com\/en_US\/i\/scr\/pixel.gif\" width=\"1\" height=\"1\" \/>\n    <\/div>\n<\/form>\n<!-- End PayPal Donations -->\n<\/p>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_w045606   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h3>Pictures<\/h3><p>Below are some pictures of what you will see along the way.<\/p>    <\/div>\n<\/div>\n<!-- \/module text --><div  class=\"module themify_builder_slider_wrap tf_clearfix module-slider tb_o347571  slider-default  \" data-lazy=\"1\">\n        <div class=\"themify_builder_slider tf_carousel tf_swiper-container tf_rel tf_overflow\" data-lazy=\"1\"        data-visible=\"1\"\n        data-tab-visible=\"1\"\n        data-mob-visible=\"1\"\n        data-scroll=\"1\"\n                            data-auto=\"4000\"\n            data-controller=\"0\"\n            data-pause_hover=\"1\"\n                data-speed=\"normal\"\n        data-wrapvar=\"1\"\n        data-slider_nav=\"1\"\n        data-pager=\"1\"\n        data-effect=\"scroll\" \n        data-height=\"variable\"\n        data-css_url=\"https:\/\/www.backroadswest.com\/blog\/wp-content\/themes\/pinboard\/themify\/themify-builder\/css\/modules\/sliders\/carousel,https:\/\/www.backroadswest.com\/blog\/wp-content\/themes\/pinboard\/themify\/themify-builder\/css\/modules\/sliders\/slider\"\n                    >\n        <div class=\"tf_swiper-wrapper tf_lazy tf_rel tf_w tf_h tf_textc\">\n                         <div class=\"tf_swiper-slide\">            <div class=\"slide-inner-wrap\">\n                                    <div class=\"tf_rel tf_lazy slide-image\">\n                                                                            <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" class=\"tf_svg_lazy\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr1.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault Oak Glen\"><noscript><img loading=\"lazy\" decoding=\"async\" data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr1.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault Oak Glen\"><\/noscript>                                            <\/div>\n                \n                                    <div class=\"slide-content tb_text_wrap\">\n                        \n                                                    <div>Fault trace near Oak Glen &#8211; arrow points out Lone Pine Canyon<\/div>\n                                            <\/div>\n                            <\/div>\n        <\/div>                     <div class=\"tf_swiper-slide\" style=\"content-visibility:hidden\">            <div class=\"slide-inner-wrap\">\n                                    <div class=\"tf_rel tf_lazy slide-image\">\n                                                                            <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" class=\"tf_svg_lazy\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr2.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault near Oak Glen\"><noscript><img loading=\"lazy\" decoding=\"async\" data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr2.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault near Oak Glen\"><\/noscript>                                            <\/div>\n                \n                                    <div class=\"slide-content tb_text_wrap\">\n                        \n                                                    <div>Arrows point out fault along Oak Glen Road<\/div>\n                                            <\/div>\n                            <\/div>\n        <\/div>                     <div class=\"tf_swiper-slide\" style=\"content-visibility:hidden\">            <div class=\"slide-inner-wrap\">\n                                    <div class=\"tf_rel tf_lazy slide-image\">\n                                                                            <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" class=\"tf_svg_lazy\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr4.jpg\" width=\"800\" height=\"450\" alt=\"Greenspot Bridge\"><noscript><img loading=\"lazy\" decoding=\"async\" data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr4.jpg\" width=\"800\" height=\"450\" alt=\"Greenspot Bridge\"><\/noscript>                                            <\/div>\n                \n                                    <div class=\"slide-content tb_text_wrap\">\n                        \n                                                    <div>Greenspot Bridge and Seven Oaks Dam<\/div>\n                                            <\/div>\n                            <\/div>\n        <\/div>                     <div class=\"tf_swiper-slide\" style=\"content-visibility:hidden\">            <div class=\"slide-inner-wrap\">\n                                    <div class=\"tf_rel tf_lazy slide-image\">\n                                                                            <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" class=\"tf_svg_lazy\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr6.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Highland\"><noscript><img loading=\"lazy\" decoding=\"async\" data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr6.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Highland\"><\/noscript>                                            <\/div>\n                \n                                    <div class=\"slide-content tb_text_wrap\">\n                        \n                                                    <div>No-man&#8217;s land between homes marks the fault<\/div>\n                                            <\/div>\n                            <\/div>\n        <\/div>                     <div class=\"tf_swiper-slide\" style=\"content-visibility:hidden\">            <div class=\"slide-inner-wrap\">\n                                    <div class=\"tf_rel tf_lazy slide-image\">\n                                                                            <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" class=\"tf_svg_lazy\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr7.jpg\" width=\"800\" height=\"450\" alt=\"East Highland Reservoir\"><noscript><img loading=\"lazy\" decoding=\"async\" data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr7.jpg\" width=\"800\" height=\"450\" alt=\"East Highland Reservoir\"><\/noscript>                                            <\/div>\n                \n                                    <div class=\"slide-content tb_text_wrap\">\n                        \n                                                    <div>Sag pond: East Highland Reservoir<\/div>\n                                            <\/div>\n                            <\/div>\n        <\/div>                     <div class=\"tf_swiper-slide\" style=\"content-visibility:hidden\">            <div class=\"slide-inner-wrap\">\n                                    <div class=\"tf_rel tf_lazy slide-image\">\n                                                                            <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" class=\"tf_svg_lazy\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr8.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Highland\"><noscript><img loading=\"lazy\" decoding=\"async\" data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr8.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Highland\"><\/noscript>                                            <\/div>\n                \n                                    <div class=\"slide-content tb_text_wrap\">\n                        \n                                                    <div>Fault scarp on the end of Orange Street in Highland<\/div>\n                                            <\/div>\n                            <\/div>\n        <\/div>                     <div class=\"tf_swiper-slide\" style=\"content-visibility:hidden\">            <div class=\"slide-inner-wrap\">\n                                    <div class=\"tf_rel tf_lazy slide-image\">\n                                                                            <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" class=\"tf_svg_lazy\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr9.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault across San Bernardino\"><noscript><img loading=\"lazy\" decoding=\"async\" data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr9.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault across San Bernardino\"><\/noscript>                                            <\/div>\n                \n                                    <div class=\"slide-content tb_text_wrap\">\n                        \n                                                    <div>View of fault looking back towards Oak Glen<\/div>\n                                            <\/div>\n                            <\/div>\n        <\/div>                     <div class=\"tf_swiper-slide\" style=\"content-visibility:hidden\">            <div class=\"slide-inner-wrap\">\n                                    <div class=\"tf_rel tf_lazy slide-image\">\n                                                                            <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" class=\"tf_svg_lazy\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldrA.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Devore\"><noscript><img loading=\"lazy\" decoding=\"async\" data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldrA.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Devore\"><\/noscript>                                            <\/div>\n                \n                                    <div class=\"slide-content tb_text_wrap\">\n                        \n                                                    <div>The fault runs next to Foothill Street in Devore<\/div>\n                                            <\/div>\n                            <\/div>\n        <\/div>            <\/div>\n    <\/div>\n<\/div>\n        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_bdk5567 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_2 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_rizc572 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_deaw572   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p style=\"text-align: center;\">Help fund our next trip and your next adventure by purchasing a subscription to Gaia GPS. We will receive a small commission from your purchase.<\/p>\n<p><a href=\"https:\/\/classic.avantlink.com\/click.php?tool_type=ml&amp;merchant_link_id=8988a2bc-2458-428a-a722-9a326e4941c5&amp;website_id=cb6aacf1-7563-4b97-8b5d-48e9519fe173\" target=\"_blank\" rel=\"noopener sponsored\"><img loading=\"lazy\" decoding=\"async\" style=\"border: 0px;\" src=\"https:\/\/classic.avantlink.com\/gbi\/bd4517b4-b0f2-4660-8208-2ade3a1fdb4c\/8988a2bc-2458-428a-a722-9a326e4941c5\/a24ae5c1-c37a-45ea-b3f8-5480cc46d529\/cb6aacf1-7563-4b97-8b5d-48e9519fe173\/image.png\" alt=\"\" width=\"300\" height=\"250\" \/><\/a><\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                    <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_bpol572 last\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_gg8q572   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- Skyscraper160x600 --><br \/>\n<ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"8100341909\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_5zjv567 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_1 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col-full tb_l3xz572 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_fyeq572   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <div class=\"g g-11\"><div class=\"g-single a-27\"><a class=\"gofollow\" data-track=\"MjcsMTEsNjA=\" title=\"Snap Shots West\" href=\"http:\/\/www.backroadswest.com\/ssw\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\" size-medium wp-image-2382 aligncenter\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2021\/01\/Ad-800x500-2a.gif\" width=\"800\" height=\"500\" \/><\/a><\/div><\/div>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module divider -->\n<div  class=\"module tf_mw module-divider tb_p3t1573 solid   \" style=\"border-width: 1px;border-color: #000;\" data-lazy=\"1\">\n    <\/div>\n<!-- \/module divider -->\n<!-- module text -->\n<div  class=\"module module-text tb_5njk573   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h4>Highland<\/h4>\n<p>We continue west on Greenspot Road into Highland. The fault can be seen on the right, hugging the base of the mountains behind the neighborhoods. In one of the neighborhoods, a small park or greenspace is situated against the mountains and was built on top of the fault. Across Highland and San Bernardino, after city managers and developers realized homes were being built on top of the fault before the 1980s, land on top of the fault became off-limits to build on. To use up that space, parks or greenspaces were established.<\/p>\n<p>That park can be found where San Benito Street turns into (corner of) Mc Lean Street. The long skinny park sits on top of the fault and is oriented in the direction of the fault that we\u2019ve been following since Oak Glen.<\/p>\n<figure id=\"attachment_6390\" aria-describedby=\"caption-attachment-6390\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr5.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6390\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr5.jpg\" alt=\"San Andreas Fault in Highland\" width=\"800\" height=\"450\" srcset=\"https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr5.jpg 800w, https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr5-300x169.jpg 300w, https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr5-768x432.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><figcaption id=\"caption-attachment-6390\" class=\"wp-caption-text\">Park or greenspace on top of fault<\/figcaption><\/figure>\n<p>We\u2019ll then head up to Base Line Street, which is a main thoroughfare through Highland and San Bernadino. First, we\u2019ll head to where it dead-ends by turning right from Greenspot Road onto Weaver Street, then right onto Base Line. In a short distance, the street passes by the base of the mountains on the left, which is where the fault sits. At Base Line\u2019s dead-end, we can see the fault coming from where we just were at Seven Oaks Dam.<\/p>\n<p>On Base Line, you\u2019ll pass by the Natural Parkland Trailhead. The kiosks here talk about what to see in this nature preserve but does not mention the fault.<\/p>\n<p>Just to the west of the trailhead along Base Line, topo maps show another sag pond. You can make out where it was (or <em>is<\/em> located during a wet year) by a large cluster of trees and a few palm trees near the intersection of Base Line and Alpin Street.<\/p>\n<p>Heading west on Base Line, when we return to Weaver Street, we\u2019ll turn right. This road turns into Highland Avenue, another main thoroughfare. After the road slowly turns to the west, turn left onto Cloverhill Drive. On the left, we\u2019ll look at East Highland Reservoir, which is a converted sag pond and situated right on top of the fault. The sag pond is located inside a private club.<\/p>\n<p>Continuing west on Highland Avenue, we cross over the 330 Freeway that climbs the mountains up to Big Bear and, just after the intersection, we\u2019ll encounter a shopping center with Walmart being the anchor store. Unlike other shopping centers, the front face of the anchor store is not parallel to the street. Instead, it is angled about 15 degrees away from the street on its left side. Why is that? When you look at aerial imagery from a map, it is obvious \u2013 the angle is oriented to the San Andreas. Walmart sits directly on top of the fault. Taking a short drive around the backside of Walmart, the berm on the building\u2019s north side is most likely a scarp but has been accentuated by terracing above it for the neighboring mobile home park.<\/p>\n<p>Back to heading west on Base Line, turn right onto Orange Street. This leads us to an interesting loop road taking us through a small neighborhood built on top of the fault. It also offers a great view of the area around us including our next stop, the Yaamava&#8217; Resort &amp; Casino, formally known as San Manual.<\/p>\n<p>The casino buildings were built on the south edge of the fault. Navigating to Piedmont Drive and Willow Drive will give you an overall view of the fault and its relationship to the casino property. The steep sloops on the north side of the property, is the fault. Then, we\u2019ll head up Willow Drive to see more houses built on and next to the fault. In fact, most of Willow Drive is directly on top of the fault line plotted on the geologic map.<\/p>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_6hjr573   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- Skyscraper160x600 --><br \/>\n<ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"8100341909\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_wox5764   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h4>San Bernardino<\/h4>\n<p>From Highland, we\u2019re going to make a big jump in distance to the northwest side of San Bernardino, to the campus of Cal State University San Bernardino. In between here and Highland, the fault continues to pass through many neighborhoods, including more parks like the one we saw earlier built on top of the fault.<\/p>\n<p>We\u2019ll navigate to Devils Canyon Road and Campus Parkway, then continue driving north up Devils Canyon towards the mountains. In the distance, we can see a set of large pipes coming down the mountainside. This is the California Aqueduct. It transports water all the way from Northern California. On the other side of the pipes is a large storage reservoir named Lake Silverwood. The buildings at the bottom of the pipes include a powerhouse that generates electricity to energize the pumps that carry the water through the aqueduct\u2019s long length. Obviously, the aqueduct is a significant water source for the Inland Empire region.<\/p>\n<p>Just before reaching the aqueduct facilities on Devils Canyon Road, both the San Andreas and another fault, named the Mill Creek Fault, cross the road and the aqueduct, which are the large above-ground pipes you\u2019ll see on the left. The San Andreas crosses the street just before a grove of large eucalyptus trees, and the Mill Creek crosses it just after the trees.<\/p>\n<p>One of course would wonder how well the aqueduct and these facilities would survive when a large earthquake on either of these faults will occur. We couldn\u2019t find many details on what types of precautions engineers took to protect these facilities from violent shaking like the extra precautions taken at Seven Oaks Dam. The aqueduct was built in the 1960s and it wasn\u2019t until around 1970 when geologists understood the significance of the San Andreas (of it being a plate boundary rather than an ordinary fault). One would hope that retrofits have been on-going that would protect vulnerable equipment from the shaking that will occur during the next earthquake.<\/p>\n<div class=\"g g-11\"><div class=\"g-single a-30\"><a class=\"gofollow\" data-track=\"MzAsMTEsNjA=\" title=\"BackRoadsWest.com\" href=\"https:\/\/www.backroadswest.com\/brw\/tour-planning\/\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\" size-medium wp-image-2382 aligncenter\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2024\/01\/Ad-800x500-TripPlan1.gif\" width=\"800\" height=\"500\" \/><\/a><\/div><\/div>\n<h4>Devore<\/h4>\n<p>Our next stop is the rural mountainside community of Devore, also known as a junction of two freeways leaving the Los Angeles area \u2013 Interstates 15 and 215. From Cal State S.B., we\u2019re going to jump on the 215 Freeway, head north, exit at Devore Road, then turn right.<\/p>\n<p>Just before exiting the freeway, looking to the right at the base of the mountains. You\u2019ll see a few long abrupt ridges that look like fault scarps. These are easily mistaken for fault scarps along the San Andreas, but they are not. These are ridges that were cut into the landscape from erosion and violent floods that have come down from the adjacent steep mountainsides. The fault is located closer to the base of the mountains.<\/p>\n<p>We\u2019ll take the steep course of Devore Road north towards the mountains and continue north as it seems the main road turns to the left (west), which becomes Kenwood Street. Staying on Devore Road, it will soon turn right and turn into Foothill Street. After a few hundred feet, the fault runs parallel the road on the left. Further down, the road cuts through a ridge that was pushed up by the fault.<\/p>\n<p>Turning right onto the next street, which is Knoll Street, we pass through a shallow dip or depression. Similar to when we visited East Highland Reservoir on Cloverhill Drive, a depression like this often marks where a strike-slip fault crosses a roadway. Several examples of such depressions can be found all around Devore. In fact, when we continue on Knoll Street for another few hundred feet, it crosses a second depression. This is the Tokay Hill Fault, named after nearby Tokay Hill. This fault is only a mile in length. Devore is actually riddled with a lot of shorter faults because of its proximity to the convergence between the San Bernardino and San Gabriel Mountains.<\/p>\n<h4>Tour\u2019s End<\/h4>\n<p>This concludes our touring route of the San Andreas Fault between Oak Glen and Devore. While high up in Devore, as you drive around the streets, be on the lookout for traces of the fault alongside the base of the mountains \u2013 where the semi-steep neighborhoods of Devore transition to the very steep edge of the San Bernardino Mountains.<\/p>\n<p>Seeing the sights between Oak Glen and Devore will certainly take up a good part of the day. To spend another day touring the San Andreas, you can pickup the beginning of our San Andreas Fault tour near Wrightwood, which begins a few miles north up Route 66 from Devore.<\/p>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_084s639   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- Skyscraper160x600 --><br \/>\n<ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"8100341909\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_9cba573   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h2>What We Found Interesting<\/h2>\n<p>When we went on this tour to investigate the details and photograph the places you\u2019ll see, there were several things that we found interesting, maybe even odd.<\/p>\n<p>In general, we were amazed that there were no signs or kiosks pointing out the location of the San Andreas anywhere along our tour route. Where roads crossed the fault and it was easy to see it, in order to gain more public awareness, it would be helpful to place signs indicating where roads cross the fault. Along with the kiosk signs that we read along the tour explaining the surrounding nature, it would be easy to add a paragraph, or even a separate sign, that explains how the surrounding landscape has been affected by the San Andreas.<\/p>\n<p>In other places in California, such as near Paso Robles and in the Bay Area, signs have been installed indicating that you are crossing the fault or simply looking at its trace. Installing some signs such as these may be helpful in educating people living with the fault in the Inland Empire region.<\/p>\n<p>When we encountered and talked to three different people during our drive, we were surprised that they were not aware that they were standing very near the fault. Naturally, we don\u2019t expect the common person to know the location of the fault. The science of geology behind fault systems like the San Andreas is complex. However, certainly in Florida, residents there understand how weather systems take shape and run its course. It\u2019s surprising that in the Inland Empire area, people don\u2019t seem concerned or aware of the various faults. That will probably change when the next large earthquake hits this region.<\/p>\n<p>When living near the region (Victor Valley) for many years and attending various geology classes, it has come to our attention that <em>two<\/em> significant earthquakes occurred on the San Andreas somewhere near Wrightwood in 1812 that would have impacted the area this tour covers. Called the Capistrano or Wrightwood earthquake, it shook a large area of Southern California. The only known deaths were 40 Native Americans attending mass at Mission San Juan Capistrano, which was poorly constructed. Since the area was barely populated then, there were no accounts of the quake, other than the occupants of the missions. Geologists studying this portion of the San Andreas agree that the event most likely occurred on it or the nearby San Jacinto fault. The magnitude was estimated to be between 6.9 and 7.5.<\/p>\n<p>With the 1812 quakes in mind, no other known event occurred on the San Andreas from Wrightwood, down to the Coachella Valley (Palm Springs). The age-old question still exists quandary still exists, on average, how often does an earthquake occur on the San Andreas at different places? This is a question that geologists are having a hard time answering.<\/p>\n<h2 id=\"PlacesWeVisit\">The Places We Visit<\/h2>\n<p>This section lists the places we visited and mentioned in the tour description above, as well as the various fault features you can find. If you use a navigation app like Google Maps, you should be able to key these intersections, addresses and placenames into the app, and it will navigate you to each of the places.<\/p>\n<p>Along with the places to navigate below, it is very helpful to use the Gaia GPS app, along with the downloadable GPX file we provide below, to locate these places, along with where the San Andreas Fault and zone is located using the app\u2019s <em>Bedrock Geology<\/em> layer.<\/p>\n<p>This list of places is available for PDF download below. Once the PDF is loaded on your phone, you can open it, then \u201ctap and hold\u201d to select the placenames or addresses, copy them to the clipboard, switch to a mapping app, then paste them into the search box of the mapping app. Using this method, you can quickly and easily navigate to each of the places.<\/p>\n<p><strong>Oak Glen Rd &amp; Glen Rd, Oak Glen<\/strong> \u2013 the beginning of our tour \u2013 head west or downhill<\/p>\n<p><strong>38392 Oak Glen Rd, Oak Glen<\/strong> \u2013 Apple Blossom Ranch; fault is behind these buildings<\/p>\n<p><strong>0.3 mile down Oak Glen Rd<\/strong> \u2013 large turnout on the right; offers a great view of the San Andreas Fault to the northwest to Lone Pine Canyon (Cajon Pass) 40 miles \u201ccrow fly\u201d away<\/p>\n<p><strong>38490 Oak Glen Rd, Yucaipa<\/strong> \u2013 fault is behind the Oak Glen Steak House<\/p>\n<p><strong>0.6 mile past Steak House<\/strong> \u2013 fault can be seen on the right as a straight line where the gradual slope turns to a steep mountainside<\/p>\n<p><strong>Yucaipa Ridge Rd &amp; Quartz St, Yucaipa<\/strong> \u2013 head up this steep road to view both a sag pond and well-defined shutter ridge<\/p>\n<p><strong>0.7 mile from Bryant St &amp; Hwy 38<\/strong> \u2013 turn around at the large turnout on the left (west); this is where the San Andreas Fault crosses the road and the Mill Creek drainage<\/p>\n<p><strong>Old Greenspot Bridge<\/strong> \u2013 trailhead for walking up to the old bridge and examine the area and kiosks \u2013 the top of Seven Oaks Dam can be seen up the canyon<\/p>\n<p><strong>San Benito St &amp; Mc Lean St, Highland<\/strong> \u2013 long skinny park or greenspace situated on top of the fault<\/p>\n<p><strong>Base Line St &amp; Brookwood Lane, Highland<\/strong> \u2013 Natural Parkland Trailhead; road is next to the fault on the mountain side; Base Line will dead-end with a view of the fault heading back towards Seven Oaks Dam<\/p>\n<p><strong>Base Line St &amp; Aplin St<\/strong> \u2013 sag pond just north of this intersection<\/p>\n<p><strong>Highland Ave &amp; Pleasant View Ln<\/strong> \u2013 fault crosses diagonally over this intersection; notice the skinny long \u201cno-man\u2019s land\u201d that exists between the rows of homes on both sides of the road<\/p>\n<p><strong>6892 Cloverhill Dr, Highland<\/strong> \u2013 just beyond the Spring Lake Clubhouse, on the left is the East Highland Reservoir, a sag pond located on the fault<\/p>\n<p><strong>4210 Highland Ave, Highland<\/strong> \u2013 Walmart just past the 330 Freeway; building is oriented in the direction of the fault; Walmart sits directly on top of the fault<\/p>\n<p><strong>3435 Holly Cir Dr, Highland<\/strong> \u2013 loop road going through small neighborhood next to fault with great views of valley below<\/p>\n<p><strong>Yaamava&#8217; Resort &amp; Casino<\/strong> \u2013 fault is located directly behind casino buildings on Piedmont Drive<\/p>\n<p><strong>Willow Dr &amp; Hemlock Dr, San Bernardino<\/strong> \u2013 street and houses located directly on the fault<\/p>\n<p><strong>Hill Dr &amp; Acacia Ave, San Bernardino<\/strong> \u2013 Newberry Memorial Park is another greenspace located on the fault<\/p>\n<p><strong>Devils Canyon Rd &amp; Campus Pkwy, San Bernardino<\/strong> \u2013 pass by Cal State San Bernardino campus and head up Devils Canyon to view California Aqueduct facilities; faults are located near grove of eucalyptus trees<\/p>\n<p><strong>Dement St &amp; Cable Canyon Rd, San Bernardino<\/strong> \u2013 looking up Cable Canyon Rd, long abrupt ridges that look like fault scarps are not; fault is at base of mountains<\/p>\n<p><strong>Knoll St &amp; Foothill St<\/strong> \u2013 head south on Knoll Street to see the two depressions the street passes through, the first being the San Andreas Fault and the second the Tokay Hill Fault<\/p>\n<p><strong>Swarthout Canyon Rd &amp; Cajon Blvd<\/strong> \u2013 beginning of our San Andreas Fault tour near Wrightwood<\/p>\n<p><a href=\"\/blog\/gpx-files\/SanAndreasSanBerdoTripLog.pdf\" download=\"\">Click here<\/a> to download a PDF file of this list of places along the tour. Remember to copy\/paste these placenames and addresses from the PDF onto the search box of your navigation app (e.g., Google Maps).<\/p>\n<div class=\"g g-11\"><div class=\"g-single a-29\"><a class=\"gofollow\" data-track=\"MjksMTEsNjA=\" title=\"BackRoadsWest.com\" href=\"https:\/\/www.backroadswest.com\/brw\/geology-tour-st-george\/\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\" size-medium wp-image-2382 aligncenter\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2024\/02\/Ad-800x500-GeologyTour2.gif\" width=\"800\" height=\"500\" \/><\/a><\/div><\/div>\n<h2 id=\"TripMap\">Trip Map<\/h2>\n<p>To help plan your trip, either use our interactive Google Map below or download our GPX file that points out the places to see that are mentioned in this chapter.<\/p>\n<p><a href=\"\/blog\/gpx-files\/SanAndreasSanBerdo.gpx\" download=\"\">Click here<\/a> to download our GPX file that follows our tour of the San Andreas Fault through San Bernardino. We recommend using a GPS mapping app, such as Gaia GPS, to view these points on your computer or to locate them using GPS with your mobile device or phone. Click the ad below to purchase Gaia GPS using our discount code which offers a significant discount and we&#8217;ll earn a few dollars to fund our next trip.<\/p>\n<p><a href=\"https:\/\/classic.avantlink.com\/click.php?tool_type=ml&amp;merchant_link_id=2efe71d3-5569-4c72-a69e-e9258881dd0a&amp;website_id=cb6aacf1-7563-4b97-8b5d-48e9519fe173\" target=\"_blank\" rel=\"noopener sponsored\"><img loading=\"lazy\" decoding=\"async\" style=\"border: 0px;\" src=\"https:\/\/classic.avantlink.com\/gbi\/bd4517b4-b0f2-4660-8208-2ade3a1fdb4c\/2efe71d3-5569-4c72-a69e-e9258881dd0a\/a24ae5c1-c37a-45ea-b3f8-5480cc46d529\/cb6aacf1-7563-4b97-8b5d-48e9519fe173\/image.png\" alt=\"\" width=\"728\" height=\"90\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.backroadswest.com\/blog\/map\/\">Learn more<\/a> about our maps.<\/p>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module maps pro -->\n<div  id=\"tb_c8ux577\" class=\"module module-maps-pro tb_c8ux577  tf_lazy\" data-zoom=\"10\" data-type=\"TERRAIN\" data-address=\"34.165397095380946, -117.22290178125108\" data-scrollwheel=\"1\" data-draggable=\"desktop_only\" data-disable_map_ui=\"\" data-polyline=\"\" data-geodesic=\"\" data-polylineStroke=\"2\" data-polylineColor=\"\" data-trigger=\"\" data-mapid=\"\" data-style_map=\"pale-dawn\" data-legacymarkers=\"\" data-lazy=\"1\">\n\t\n\t\t\t<div class=\"maps-pro-canvas-container\">\n\t\t\t<div class=\"maps-pro-canvas\" style=\"width:100%;height:350px\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t<template>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.048833,-116.946302\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tStart of our tour in Oak Glen\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.053616,-116.959512\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tGreat view of the San Andreas Fault to the northwest\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.058022,-116.974626\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tFault is oat base of mountains on the right of the road\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.079474,-117.030382\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tSag pond on private property\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.080583,-117.032227\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tDirt road leads into a shutter ridge - better view just up the paved road a few hundred feet\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.08584,-117.04215\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tSan Andreas Fault crosses the road and the Mill Creek drainage\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.09864,-117.10661\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tWalk up paved walking trail to Greenspot Bridge\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.11364,-117.13449\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tThis park is situated on top of the fault\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.11997,-117.14936\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tDead-end of Base Line has view of fault looking east\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.1224,-117.15514\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tSag pond located near grove of trees and palm trees\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.12471,-117.16199\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tNotice the no-mans land here where nothing was built on top of fault\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.12761,-117.16934\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tModified sag pond on private property\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.13759,-111.60464\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tWalmart building on top of fault - possible scarp in the rear\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.14547,-117.21312\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tOrange Street passes by fault scarp and loop road offers great view\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.15217,-117.23008\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tFault located behind buildings on Piedmont Drive\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.15413,-117.23405\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tHouses and Willow Drive located on top of fault\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.18206,-117.29401\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tAnother greenspace\/park situated on top of the fault\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.201,-117.33323\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tFault crosses aqueduct near grove of eucalyptus trees\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div data-address=\"34.23651,-117.40034\" data-image=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/icon-info.png\">\n\t\t\t\t\t\tStreet passes thru two depressions marking San Andreas and Tokay Hill Fault\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/template>\n\t\t\t\t\n\t<\/div>\n<!-- \/module maps pro --><!-- module text -->\n<div  class=\"module module-text tb_9try578   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h3>Comments<\/h3>\n<p>Read and leave comments about this post on <a href=\"https:\/\/www.youtube.com\/watch?v=uNKpsOTUqXY\" target=\"_blank\" rel=\"noopener\">YouTube<\/a>.<\/p>    <\/div>\n<\/div>\n<!-- \/module text -->        <\/div>\n                        <\/div>\n        <\/div>\n                        <div  data-lazy=\"1\" class=\"module_row themify_builder_row tb_jqmt567 tf_w\">\n                        <div class=\"row_inner col_align_top tb_col_count_2 tf_box tf_rel\">\n                        <div  data-lazy=\"1\" class=\"module_column tb-column col4-2 tb_t1mh578 first\">\n                    <!-- module text -->\n<div  class=\"module module-text tb_x8ol578   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <h3>Support Us<\/h3><p>Help us fill up our tank with gas for our next trip by donating $5 and we&#8217;ll bring you back more quality virtual tours of our trips!<\/p><p>Your credit card payment is safe and easy using PayPal. 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center;\"><em>See all our comprehensive virtual tour guides at<\/em>:<\/p><p style=\"text-align: justify;\"><a title=\"BackRoadsWest\" href=\"http:\/\/www.backroadswest.com\/brw\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\" size-medium wp-image-2382 aligncenter\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/BRWlogo-300x40.jpg\" alt=\"BRWlogo\" width=\"300\" height=\"40\" srcset=\"https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/BRWlogo-300x40.jpg 300w, https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/BRWlogo.jpg 438w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>    <\/div>\n<\/div>\n<!-- \/module text --><!-- module text -->\n<div  class=\"module module-text tb_h8b0579   \" data-lazy=\"1\">\n        <div  class=\"tb_text_wrap\">\n        <p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- Short-wide --><br \/>\n<ins class=\"adsbygoogle\" style=\"display:inline-block;width:728px;height:90px\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"1662640655\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n    <\/div>\n<\/div>\n<!-- \/module text --><!-- module callout -->\n<div  class=\"module ui module-callout tb_fdhl579 button-bottom red  rounded gradient shadow wow\" data-tf-animation=\"rubberBand\" data-lazy=\"1\">\n    \n    <div class=\"callout-inner\">\n    <div class=\"callout-content tf_left\">\n        <h3 class=\"callout-heading\">More Trips<\/h3>\n        <div class=\"tb_text_wrap\">\n            Wanna see more trips in Utah?        <\/div>\n    <\/div>\n    <!-- \/callout-content -->\n                    <div class=\"callout-button tf_right tf_textr\">\n            <a href=\"http:\/\/www.backroadswest.com\/blog\/category\/utah\/\" class=\"ui builder_button rounded gradient shadow yellow\">\n                <span class=\"tb_callout_text\">See More Utah Trips<\/span>\n            <\/a>\n        <\/div>\n            <\/div>\n    <!-- \/callout-content -->\n<\/div>\n<!-- \/module callout -->\n        <\/div>\n                        <\/div>\n        <\/div>\n        <\/div>\n<!--\/themify_builder_content-->","protected":false},"excerpt":{"rendered":"<p>Along with our other road trips along California\u2019s San Andreas Fault, this tour takes us through the streets of San Bernardino, Highland, Yucaipa and Oak Glen, which are all cities within the region known as the Inland Empire east of Los Angeles. Similar to our tour of the San Francisco Peninsula showcasing the San Andreas, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":6384,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,24,12,15,30,17,19,18,20],"tags":[],"class_list":["post-6397","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-california","category-geology","category-places","category-roadeasy","category-san-andreas-fault","category-season-fall","category-season-spring","category-season-summer","category-season-winter","has-post-title","has-post-date","has-post-category","has-post-tag","has-post-comment","has-post-author",""],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"#Take this road trip along California\u2019s San Andreas Fault thru the streets of San Bernardino and other cities within the the 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00:26:01","updated":"2026-09-09 17:57:25","seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.backroadswest.com\/blog\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.backroadswest.com\/blog\/category\/california\/\" title=\"California\">California<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tSan Andreas Fault in San Bernardino\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/www.backroadswest.com\/blog"},{"label":"California","link":"https:\/\/www.backroadswest.com\/blog\/category\/california\/"},{"label":"San Andreas Fault in San Bernardino","link":"https:\/\/www.backroadswest.com\/blog\/san-andreas-fault-in-san-bernardino\/"}],"builder_content":"<p><strong>Along with our other road trips along California\u2019s San Andreas Fault, this tour takes us through the streets of San Bernardino, Highland, Yucaipa and Oak Glen, which are all cities within the region known as the Inland Empire east of Los Angeles.<\/strong> Similar to our tour of the San Francisco Peninsula showcasing the San Andreas, this tour passes through a populated area and reveals how homes are built next to and on top of the fault zone. Although it\u2019s possible to see many fault features in this tour, such as sag ponds and fault scarps, many have been erased by land development.<\/p>\n<img src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdo.jpg\" width=\"300\" height=\"218\" title=\"San Andreas Fault in San Bernardino\" alt=\"San Andreas Fault in San Bernardino\">\n<h3><\/h3> <strong>Click image<\/strong> to watch Virtual Video Tour and see viewer comments. Then come back to get the rest of the story.\n<a href=\"https:\/\/www.youtube.com\/watch?v=uNKpsOTUqXY\" rel=\"noopener\" target=\"_blank\"> <img src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoYouTube.jpg\" width=\"723\" height=\"407\" title=\"San Andreas Fault in San Bernardino\" alt=\"San Andreas Fault in San Bernardino\"> <\/a>\n<h3>Trip Specs<\/h3>\n<h3>Length<\/h3> About 50 miles one-way\n<h3>Attractions<\/h3> <ul> <li>Fault features<\/li> <li>Homes built on San Andreas<\/li> <\/ul>\n<h3>Difficulty<\/h3> <ul> <li>Easy<\/li> <li>See <a href=\"#PlacesWeVisit\">Places We Visit<\/a><\/li> <\/ul>\n<h3>Elevation Gain<\/h3> Low point 1,600 feet elevation High point 4,800 feet\n<p>For those that have watched the virtual video tour above, reading this blog post will give you more insight into this segment of the San Andreas Fault. It also explains the touring route as well as more details about each stop that we\u2019ll visit.<\/p> <p>See the <a href=\"#TripMap\">Trip Map<\/a> for an interactive map of our touring route and a link to download the GPX file we created containing the waypoints for plotting onto Gaia GPS the places we visit. Using Gaia GPS\u2019s <em>Bedrock Geology<\/em> layer plots the path of the San Andreas, making it easy to find many of the features described in this tour.<\/p> <h2>Fault Terminology<\/h2> <p>Throughout this tour, we\u2019ll be visiting places where we can see signs of the San Andreas Fault. Those \u201csigns\u201d are what we call \u201cfault features\u201d. Here are some of those features explained.<\/p> <p>Keep in mind that the San Andreas isn\u2019t just a regular fault like many others, it is a significantly large fault. It\u2019s actually a <em>plate boundary<\/em> \u2013 the boundary between the North American Plate and the Pacific Plate. Both of these plates are experiencing what\u2019s called <em>continental drift<\/em> and are literally sliding past (or rubbing against) each other very, very slowly. This edge or division between the two plates is the San Andreas Fault. Earthquakes occur when that sliding turns into a sudden jerk of movement. Explaining further involves a lengthy discussion of <em>plate tectonics<\/em>, which is out of scope of this article. Learn more by Googling \u201cplate tectonics\u201d.<\/p> <p>The San Andreas is also a type of fault known as a <em>right-lateral strike-slip fault<\/em>. That means, if you are standing on one side of the fault and looking towards the other side, the land on the other side of the fault would be moving to the right. That means, the land on the Pacific Plate, which would include the Los Angeles area, is moving northwest. The land on the North American Plate, including the San Bernardino Mountains and Mojave Desert to the north, is either stationary or moving very slowly to the southeast.<\/p> <p>[adrotate group=\"11\"]<\/p> <p>The fault isn\u2019t always a single line or deep \u201ccrack\u201d in the ground dividing the two plates. It can also be a \u201cfault zone\u201d. This zone can be anywhere from a hundred feet thick to a half mile across. These zones consist of many factures that are all related to each other. In some places on our tour, the fault is not more than 50 feet wide. In other places, it\u2019s just under a quarter of a mile wide.<\/p> <p>Here are some of the fault features we\u2019ll see in this tour:<\/p> <ul> <li><strong>Fault scarp:<\/strong> an abrupt and straight edge, like a step in the contour of the land<\/li> <li><strong>Shutter ridge:<\/strong> a straight and shallow trough in the ground<\/li> <li><strong>Sag pond:<\/strong> a low depression where water is trapped by the fault\u2019s impermeable barrier of crushed earth material and begins ponding<\/li> <li><strong>Linear valley:<\/strong> a long and skinny valley created by a significant strike-slip fault like the San Andreas \u2013 on this tour, we\u2019ll constantly be looking at Lone Pine Valley for reference, which is a linear valley<\/li> <\/ul> [caption id=\"attachment_6388\" align=\"aligncenter\" width=\"800\"]<a href=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr3.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr3.jpg\" alt=\"Shutter ridge near Oak Glen\" width=\"800\" height=\"450\" srcset=\"https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr3.jpg 800w, https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr3-300x169.jpg 300w, https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr3-768x432.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a> Arrows point out shutter ridges along Yucaipa Ridge Rd[\/caption] <p>Both scarps and shutter ridges were either created during an earthquake event or by slow movement along the fault, known as <em>fault creep<\/em>. Some scarps were created during earthquakes that occurred a few hundred years ago and still look like an abrupt step in the landscape. Other scarps are from earthquakes possibly thousands of years ago and are difficult to make out because natural erosion is slowly erasing them.<\/p> <p>The challenge on this particular tour, which passes through a lot of developed land, will be to find those features. A lot of land was bulldozed and leveled to make way for development, which erased some of these fault features. However, in the first half of the tour, the fault passes over undeveloped mountains, revealing a lot of features. The second part of the tour passes through developed areas and features can only be seen in certain areas.<\/p>\n<p><br \/> <br \/> <ins style=\"display:block\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"8100341909\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/> <\/p>\n<h2>Trip Route<\/h2> <p>Our tour of this segment of the San Andreas Fault begins in the quaint town of Oak Glen and ends in the small community of Devore at the foot of the Cajon Pass. Since the fault hugs the southern edge or base of the San Bernardino Mountains, our touring route will essentially follow this edge. After starting in Oak Glen, we\u2019ll pass through the towns of Yucaipa, Highland and San Bernardino, then ending in Devore.<\/p> <p>Unlike most of our other tours that follow a route of one to five roads, this tour will be difficult to follow as it wonders down many different streets making many turns. For that reason, rather than provide left and right directions like we do on our other tours, with this tour, we\u2019ll provide a list of addresses or placenames that you can navigate to, using your favorite navigation app like Google Maps.<\/p> <h4>Oak Glen &amp; Yucaipa<\/h4> <p>Beginning in Oak Glen at the intersection of Oak Glen Road and Glen Road, we\u2019ll begin heading west or downhill. For the next 2-3 miles, the road will zig-zag and pass within a hundred feet of the fault and, a few times, the road crosses it. Here, the fault will be on the right (the mountain side) and, in some places, be just behind buildings.<\/p> <p>From here, way in the distance, we can see where our tour ends in Devore and, just behind Devore, we can easily spot Lone Pine Canyon, which is a linear valley next to the Cajon Pass. This is where our other San Andreas tour starts that passes through Wrightwood and over the San Gabriel Mountains. Lone Pine Canyon is about 40 miles away from here.<\/p> <p>We\u2019ll continue on Oak Glen Road down into Yucaipa and turn right (north) onto Bryant Street. We\u2019ll head up Yucaipa Ridge Road to view both a sag pond and a shutter ridge that sit on top of the fault. From this point, we\u2019ll also get a view of the fault and where we came from in Oak Glen.<\/p> <p>Take note that in late September 2022, heavy rains caused a series of large mudslides that damaged many of the homes and businesses along this stretch of Oak Glen Road. The road was actually closed for two months after the mudslides. Fires from the previous years burned vegetation that keep soils in place. Without the vegetation, rushing water will easily pickup and carry topsoil and ash down the steep slopes, which is a common theme all along this tour from Oak Glen to Devore. The communities of Devore and Highland have also suffered from massive mud and landslides following large rainstorms months or years after wildfires scared the mountains above.<\/p> <p>The steep topography of the mountains, coupled with the adjacent gradual slopes where these communities were built, is a product of the San Andreas Fault itself. Evidence of past erosion shows that mudslides and floods from the steep mountainsides above have been occurring all along this tour route for centuries. Not only are these mudslides the fault of a deluging downpour, it\u2019s also the San Andreas\u2019 fault (pun intended) for creating these steep slopes.<\/p>\n<p><br \/><br \/><ins style=\"display: block;\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"8100341909\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/><\/p>\n<h4>Hwy 38 &amp; Mill Creek<\/h4> <p>Next, we\u2019ll head up Hwy 38 a short distance to where the fault crosses the road, as well as the large drainage of Mill Creek. There\u2019s little trace of the fault here other than possibly a few shutter ridges. Any trace of the fault was covered by the massive amounts of alluvium (boulders and gravel) that have flowed out of the canyon.<\/p> <p>We\u2019ll now head down (west) Hwy 38 as we travel away from the fault. After a few miles, we turn right onto Garnet Street, which turns into Greenspot Road. In the distance, we\u2019ll see the massive Seven Oaks Dam. When we pan our eyes to the left, we\u2019ll see a long stretch of the fault along the base of the mountains all the way to Lone Pine Canyon, which is now about 25 \u201ccrow fly\u201d miles away.<\/p> <p>Along this stretch of road, similar to what we saw along Hwy 38 a short distance back, we\u2019ll cross over a large alluvial plain. This is a larger field of alluvium that has flowed out of the San Bernardino Mountains for a very long period of time. It has covered up any trace of the fault here, so no fault features will be visible here.<\/p> <h4>Greenspot Bridge &amp; Seven Oaks Dam<\/h4> <p>Just before the road crosses the Santa Ana River, there will be a parking area and trailhead on the right. Park here and walk towards the dam on the paved bicycle path. This trail will take you over the historic Greenspot Bridge.<\/p> <p>Built in 1912, the Greenspot Bridge actually began its life in Victorville, in the Mojave Desert 30 miles north of here, to span the Mojave River. When a wider bridge was needed, this bridge was moved and installed here in 1933. When traveling this road up until recently, this is the bridge you drove over and hoped there was no wide vehicle coming from the other direction! The name, Greenspot, came from an old hotel that was in Victorville. The newer bridge, that the main road uses, was built in 2015. As you walk over the bridge, be sure to read the numerous kiosk signs located around the bridge. However, none of the kiosks mention that you are standing on top of the infamous San Andreas Fault.<\/p> <p>In this area where the bridge sits on top of the fault zone, one might wonder why a large dam was built here? Plus, the dam was built just recently (late 1990s). Seven Oaks Dam, which is one of the largest earth-filled dams in the USA, is designed specifically to withstand shocks from the nearby San Andreas. The dam is so thick that it would be impossible to cause it to fracture. Compared to Hoover Dam, which is tall, skinny, and composed of concrete, could fracture and fail if it were hit with a 8.0 magnitude earthquake.<\/p> <p>More...<\/p> <p>[adrotate group=\"4\"]<\/p>\n<h3>Support Us<\/h3> <p style=\"text-align: left;\">Help us fill up our tank with gas for our next trip by donating $5 and we'll bring you back more quality virtual tours of our trips!<\/p> <p style=\"text-align: left;\">Your credit card payment is safe and easy using PayPal. Click the [Donate] button to get started:<\/p> <p style=\"text-align: center;\">[paypal-donation]<\/p>\n<h3>Pictures<\/h3><p>Below are some pictures of what you will see along the way.<\/p>\n<img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr1.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault Oak Glen\"><noscript><img data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr1.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault Oak Glen\"><\/noscript> Fault trace near Oak Glen - arrow points out Lone Pine Canyon <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr2.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault near Oak Glen\"><noscript><img data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr2.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault near Oak Glen\"><\/noscript> Arrows point out fault along Oak Glen Road <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr4.jpg\" width=\"800\" height=\"450\" alt=\"Greenspot Bridge\"><noscript><img data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr4.jpg\" width=\"800\" height=\"450\" alt=\"Greenspot Bridge\"><\/noscript> Greenspot Bridge and Seven Oaks Dam <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr6.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Highland\"><noscript><img data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr6.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Highland\"><\/noscript> No-man's land between homes marks the fault <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr7.jpg\" width=\"800\" height=\"450\" alt=\"East Highland Reservoir\"><noscript><img data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr7.jpg\" width=\"800\" height=\"450\" alt=\"East Highland Reservoir\"><\/noscript> Sag pond: East Highland Reservoir <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr8.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Highland\"><noscript><img data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr8.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Highland\"><\/noscript> Fault scarp on the end of Orange Street in Highland <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr9.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault across San Bernardino\"><noscript><img data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr9.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault across San Bernardino\"><\/noscript> View of fault looking back towards Oak Glen <img src=\"data:image\/svg+xml,%3Csvg%20xmlns=%27http:\/\/www.w3.org\/2000\/svg%27%20width='800'%20height='450'%20viewBox=%270%200%20800%20450%27%3E%3C\/svg%3E\" loading=\"lazy\" data-lazy=\"1\" data-tf-not-load=\"1\" decoding=\"async\" data-tf-src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldrA.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Devore\"><noscript><img data-tf-not-load data-no-script src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldrA.jpg\" width=\"800\" height=\"450\" alt=\"San Andreas Fault in Devore\"><\/noscript> The fault runs next to Foothill Street in Devore\n<p style=\"text-align: center;\">Help fund our next trip and your next adventure by purchasing a subscription to Gaia GPS. We will receive a small commission from your purchase.<\/p> <p><a href=\"https:\/\/classic.avantlink.com\/click.php?tool_type=ml&amp;merchant_link_id=8988a2bc-2458-428a-a722-9a326e4941c5&amp;website_id=cb6aacf1-7563-4b97-8b5d-48e9519fe173\" target=\"_blank\" rel=\"noopener sponsored\"><img loading=\"lazy\" decoding=\"async\" style=\"border: 0px;\" src=\"https:\/\/classic.avantlink.com\/gbi\/bd4517b4-b0f2-4660-8208-2ade3a1fdb4c\/8988a2bc-2458-428a-a722-9a326e4941c5\/a24ae5c1-c37a-45ea-b3f8-5480cc46d529\/cb6aacf1-7563-4b97-8b5d-48e9519fe173\/image.png\" alt=\"\" width=\"300\" height=\"250\" \/><\/a><\/p>\n<p><br \/> <br \/> <ins style=\"display:block\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"8100341909\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/> <\/p>\n<p>[adrotate group=\"11\"]<\/p>\n\n<h4>Highland<\/h4> <p>We continue west on Greenspot Road into Highland. The fault can be seen on the right, hugging the base of the mountains behind the neighborhoods. In one of the neighborhoods, a small park or greenspace is situated against the mountains and was built on top of the fault. Across Highland and San Bernardino, after city managers and developers realized homes were being built on top of the fault before the 1980s, land on top of the fault became off-limits to build on. To use up that space, parks or greenspaces were established.<\/p> <p>That park can be found where San Benito Street turns into (corner of) Mc Lean Street. The long skinny park sits on top of the fault and is oriented in the direction of the fault that we\u2019ve been following since Oak Glen.<\/p> [caption id=\"attachment_6390\" align=\"aligncenter\" width=\"800\"]<a href=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr5.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr5.jpg\" alt=\"San Andreas Fault in Highland\" width=\"800\" height=\"450\" srcset=\"https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr5.jpg 800w, https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr5-300x169.jpg 300w, https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2022\/11\/SanAndreasSanBerdoSldr5-768x432.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a> Park or greenspace on top of fault[\/caption] <p>We\u2019ll then head up to Base Line Street, which is a main thoroughfare through Highland and San Bernadino. First, we\u2019ll head to where it dead-ends by turning right from Greenspot Road onto Weaver Street, then right onto Base Line. In a short distance, the street passes by the base of the mountains on the left, which is where the fault sits. At Base Line\u2019s dead-end, we can see the fault coming from where we just were at Seven Oaks Dam.<\/p> <p>On Base Line, you\u2019ll pass by the Natural Parkland Trailhead. The kiosks here talk about what to see in this nature preserve but does not mention the fault.<\/p> <p>Just to the west of the trailhead along Base Line, topo maps show another sag pond. You can make out where it was (or <em>is<\/em> located during a wet year) by a large cluster of trees and a few palm trees near the intersection of Base Line and Alpin Street.<\/p> <p>Heading west on Base Line, when we return to Weaver Street, we\u2019ll turn right. This road turns into Highland Avenue, another main thoroughfare. After the road slowly turns to the west, turn left onto Cloverhill Drive. On the left, we\u2019ll look at East Highland Reservoir, which is a converted sag pond and situated right on top of the fault. The sag pond is located inside a private club.<\/p> <p>Continuing west on Highland Avenue, we cross over the 330 Freeway that climbs the mountains up to Big Bear and, just after the intersection, we\u2019ll encounter a shopping center with Walmart being the anchor store. Unlike other shopping centers, the front face of the anchor store is not parallel to the street. Instead, it is angled about 15 degrees away from the street on its left side. Why is that? When you look at aerial imagery from a map, it is obvious \u2013 the angle is oriented to the San Andreas. Walmart sits directly on top of the fault. Taking a short drive around the backside of Walmart, the berm on the building\u2019s north side is most likely a scarp but has been accentuated by terracing above it for the neighboring mobile home park.<\/p> <p>Back to heading west on Base Line, turn right onto Orange Street. This leads us to an interesting loop road taking us through a small neighborhood built on top of the fault. It also offers a great view of the area around us including our next stop, the Yaamava' Resort &amp; Casino, formally known as San Manual.<\/p> <p>The casino buildings were built on the south edge of the fault. Navigating to Piedmont Drive and Willow Drive will give you an overall view of the fault and its relationship to the casino property. The steep sloops on the north side of the property, is the fault. Then, we\u2019ll head up Willow Drive to see more houses built on and next to the fault. In fact, most of Willow Drive is directly on top of the fault line plotted on the geologic map.<\/p>\n<p><br \/> <br \/> <ins style=\"display:block\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"8100341909\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/> <\/p>\n<h4>San Bernardino<\/h4> <p>From Highland, we\u2019re going to make a big jump in distance to the northwest side of San Bernardino, to the campus of Cal State University San Bernardino. In between here and Highland, the fault continues to pass through many neighborhoods, including more parks like the one we saw earlier built on top of the fault.<\/p> <p>We\u2019ll navigate to Devils Canyon Road and Campus Parkway, then continue driving north up Devils Canyon towards the mountains. In the distance, we can see a set of large pipes coming down the mountainside. This is the California Aqueduct. It transports water all the way from Northern California. On the other side of the pipes is a large storage reservoir named Lake Silverwood. The buildings at the bottom of the pipes include a powerhouse that generates electricity to energize the pumps that carry the water through the aqueduct\u2019s long length. Obviously, the aqueduct is a significant water source for the Inland Empire region.<\/p> <p>Just before reaching the aqueduct facilities on Devils Canyon Road, both the San Andreas and another fault, named the Mill Creek Fault, cross the road and the aqueduct, which are the large above-ground pipes you\u2019ll see on the left. The San Andreas crosses the street just before a grove of large eucalyptus trees, and the Mill Creek crosses it just after the trees.<\/p> <p>One of course would wonder how well the aqueduct and these facilities would survive when a large earthquake on either of these faults will occur. We couldn\u2019t find many details on what types of precautions engineers took to protect these facilities from violent shaking like the extra precautions taken at Seven Oaks Dam. The aqueduct was built in the 1960s and it wasn\u2019t until around 1970 when geologists understood the significance of the San Andreas (of it being a plate boundary rather than an ordinary fault). One would hope that retrofits have been on-going that would protect vulnerable equipment from the shaking that will occur during the next earthquake.<\/p> <p>[adrotate group=\"11\"]<\/p> <h4>Devore<\/h4> <p>Our next stop is the rural mountainside community of Devore, also known as a junction of two freeways leaving the Los Angeles area \u2013 Interstates 15 and 215. From Cal State S.B., we\u2019re going to jump on the 215 Freeway, head north, exit at Devore Road, then turn right.<\/p> <p>Just before exiting the freeway, looking to the right at the base of the mountains. You\u2019ll see a few long abrupt ridges that look like fault scarps. These are easily mistaken for fault scarps along the San Andreas, but they are not. These are ridges that were cut into the landscape from erosion and violent floods that have come down from the adjacent steep mountainsides. The fault is located closer to the base of the mountains.<\/p> <p>We\u2019ll take the steep course of Devore Road north towards the mountains and continue north as it seems the main road turns to the left (west), which becomes Kenwood Street. Staying on Devore Road, it will soon turn right and turn into Foothill Street. After a few hundred feet, the fault runs parallel the road on the left. Further down, the road cuts through a ridge that was pushed up by the fault.<\/p> <p>Turning right onto the next street, which is Knoll Street, we pass through a shallow dip or depression. Similar to when we visited East Highland Reservoir on Cloverhill Drive, a depression like this often marks where a strike-slip fault crosses a roadway. Several examples of such depressions can be found all around Devore. In fact, when we continue on Knoll Street for another few hundred feet, it crosses a second depression. This is the Tokay Hill Fault, named after nearby Tokay Hill. This fault is only a mile in length. Devore is actually riddled with a lot of shorter faults because of its proximity to the convergence between the San Bernardino and San Gabriel Mountains.<\/p> <h4>Tour\u2019s End<\/h4> <p>This concludes our touring route of the San Andreas Fault between Oak Glen and Devore. While high up in Devore, as you drive around the streets, be on the lookout for traces of the fault alongside the base of the mountains \u2013 where the semi-steep neighborhoods of Devore transition to the very steep edge of the San Bernardino Mountains.<\/p> <p>Seeing the sights between Oak Glen and Devore will certainly take up a good part of the day. To spend another day touring the San Andreas, you can pickup the beginning of our San Andreas Fault tour near Wrightwood, which begins a few miles north up Route 66 from Devore.<\/p>\n<p><br \/> <br \/> <ins style=\"display:block\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"8100341909\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><br \/> <\/p>\n<h2>What We Found Interesting<\/h2> <p>When we went on this tour to investigate the details and photograph the places you\u2019ll see, there were several things that we found interesting, maybe even odd.<\/p> <p>In general, we were amazed that there were no signs or kiosks pointing out the location of the San Andreas anywhere along our tour route. Where roads crossed the fault and it was easy to see it, in order to gain more public awareness, it would be helpful to place signs indicating where roads cross the fault. Along with the kiosk signs that we read along the tour explaining the surrounding nature, it would be easy to add a paragraph, or even a separate sign, that explains how the surrounding landscape has been affected by the San Andreas.<\/p> <p>In other places in California, such as near Paso Robles and in the Bay Area, signs have been installed indicating that you are crossing the fault or simply looking at its trace. Installing some signs such as these may be helpful in educating people living with the fault in the Inland Empire region.<\/p> <p>When we encountered and talked to three different people during our drive, we were surprised that they were not aware that they were standing very near the fault. Naturally, we don\u2019t expect the common person to know the location of the fault. The science of geology behind fault systems like the San Andreas is complex. However, certainly in Florida, residents there understand how weather systems take shape and run its course. It\u2019s surprising that in the Inland Empire area, people don\u2019t seem concerned or aware of the various faults. That will probably change when the next large earthquake hits this region.<\/p> <p>When living near the region (Victor Valley) for many years and attending various geology classes, it has come to our attention that <em>two<\/em> significant earthquakes occurred on the San Andreas somewhere near Wrightwood in 1812 that would have impacted the area this tour covers. Called the Capistrano or Wrightwood earthquake, it shook a large area of Southern California. The only known deaths were 40 Native Americans attending mass at Mission San Juan Capistrano, which was poorly constructed. Since the area was barely populated then, there were no accounts of the quake, other than the occupants of the missions. Geologists studying this portion of the San Andreas agree that the event most likely occurred on it or the nearby San Jacinto fault. The magnitude was estimated to be between 6.9 and 7.5.<\/p> <p>With the 1812 quakes in mind, no other known event occurred on the San Andreas from Wrightwood, down to the Coachella Valley (Palm Springs). The age-old question still exists quandary still exists, on average, how often does an earthquake occur on the San Andreas at different places? This is a question that geologists are having a hard time answering.<\/p> <h2 id=\"PlacesWeVisit\">The Places We Visit<\/h2> <p>This section lists the places we visited and mentioned in the tour description above, as well as the various fault features you can find. If you use a navigation app like Google Maps, you should be able to key these intersections, addresses and placenames into the app, and it will navigate you to each of the places.<\/p> <p>Along with the places to navigate below, it is very helpful to use the Gaia GPS app, along with the downloadable GPX file we provide below, to locate these places, along with where the San Andreas Fault and zone is located using the app\u2019s <em>Bedrock Geology<\/em> layer.<\/p> <p>This list of places is available for PDF download below. Once the PDF is loaded on your phone, you can open it, then \u201ctap and hold\u201d to select the placenames or addresses, copy them to the clipboard, switch to a mapping app, then paste them into the search box of the mapping app. Using this method, you can quickly and easily navigate to each of the places.<\/p> <p><strong>Oak Glen Rd &amp; Glen Rd, Oak Glen<\/strong> \u2013 the beginning of our tour \u2013 head west or downhill<\/p> <p><strong>38392 Oak Glen Rd, Oak Glen<\/strong> \u2013 Apple Blossom Ranch; fault is behind these buildings<\/p> <p><strong>0.3 mile down Oak Glen Rd<\/strong> \u2013 large turnout on the right; offers a great view of the San Andreas Fault to the northwest to Lone Pine Canyon (Cajon Pass) 40 miles \u201ccrow fly\u201d away<\/p> <p><strong>38490 Oak Glen Rd, Yucaipa<\/strong> \u2013 fault is behind the Oak Glen Steak House<\/p> <p><strong>0.6 mile past Steak House<\/strong> \u2013 fault can be seen on the right as a straight line where the gradual slope turns to a steep mountainside<\/p> <p><strong>Yucaipa Ridge Rd &amp; Quartz St, Yucaipa<\/strong> \u2013 head up this steep road to view both a sag pond and well-defined shutter ridge<\/p> <p><strong>0.7 mile from Bryant St &amp; Hwy 38<\/strong> \u2013 turn around at the large turnout on the left (west); this is where the San Andreas Fault crosses the road and the Mill Creek drainage<\/p> <p><strong>Old Greenspot Bridge<\/strong> \u2013 trailhead for walking up to the old bridge and examine the area and kiosks \u2013 the top of Seven Oaks Dam can be seen up the canyon<\/p> <p><strong>San Benito St &amp; Mc Lean St, Highland<\/strong> \u2013 long skinny park or greenspace situated on top of the fault<\/p> <p><strong>Base Line St &amp; Brookwood Lane, Highland<\/strong> \u2013 Natural Parkland Trailhead; road is next to the fault on the mountain side; Base Line will dead-end with a view of the fault heading back towards Seven Oaks Dam<\/p> <p><strong>Base Line St &amp; Aplin St<\/strong> \u2013 sag pond just north of this intersection<\/p> <p><strong>Highland Ave &amp; Pleasant View Ln<\/strong> \u2013 fault crosses diagonally over this intersection; notice the skinny long \u201cno-man\u2019s land\u201d that exists between the rows of homes on both sides of the road<\/p> <p><strong>6892 Cloverhill Dr, Highland<\/strong> \u2013 just beyond the Spring Lake Clubhouse, on the left is the East Highland Reservoir, a sag pond located on the fault<\/p> <p><strong>4210 Highland Ave, Highland<\/strong> \u2013 Walmart just past the 330 Freeway; building is oriented in the direction of the fault; Walmart sits directly on top of the fault<\/p> <p><strong>3435 Holly Cir Dr, Highland<\/strong> \u2013 loop road going through small neighborhood next to fault with great views of valley below<\/p> <p><strong>Yaamava' Resort &amp; Casino<\/strong> \u2013 fault is located directly behind casino buildings on Piedmont Drive<\/p> <p><strong>Willow Dr &amp; Hemlock Dr, San Bernardino<\/strong> \u2013 street and houses located directly on the fault<\/p> <p><strong>Hill Dr &amp; Acacia Ave, San Bernardino<\/strong> \u2013 Newberry Memorial Park is another greenspace located on the fault<\/p> <p><strong>Devils Canyon Rd &amp; Campus Pkwy, San Bernardino<\/strong> \u2013 pass by Cal State San Bernardino campus and head up Devils Canyon to view California Aqueduct facilities; faults are located near grove of eucalyptus trees<\/p> <p><strong>Dement St &amp; Cable Canyon Rd, San Bernardino<\/strong> \u2013 looking up Cable Canyon Rd, long abrupt ridges that look like fault scarps are not; fault is at base of mountains<\/p> <p><strong>Knoll St &amp; Foothill St<\/strong> \u2013 head south on Knoll Street to see the two depressions the street passes through, the first being the San Andreas Fault and the second the Tokay Hill Fault<\/p> <p><strong>Swarthout Canyon Rd &amp; Cajon Blvd<\/strong> \u2013 beginning of our San Andreas Fault tour near Wrightwood<\/p> <p><a href=\"\/blog\/gpx-files\/SanAndreasSanBerdoTripLog.pdf\" download=\"\">Click here<\/a> to download a PDF file of this list of places along the tour. Remember to copy\/paste these placenames and addresses from the PDF onto the search box of your navigation app (e.g., Google Maps).<\/p> <p>[adrotate group=\"11\"]<\/p> <h2 id=\"TripMap\">Trip Map<\/h2> <p>To help plan your trip, either use our interactive Google Map below or download our GPX file that points out the places to see that are mentioned in this chapter.<\/p> <p><a href=\"\/blog\/gpx-files\/SanAndreasSanBerdo.gpx\" download=\"\">Click here<\/a> to download our GPX file that follows our tour of the San Andreas Fault through San Bernardino. We recommend using a GPS mapping app, such as Gaia GPS, to view these points on your computer or to locate them using GPS with your mobile device or phone. Click the ad below to purchase Gaia GPS using our discount code which offers a significant discount and we'll earn a few dollars to fund our next trip.<\/p> <p><a href=\"https:\/\/classic.avantlink.com\/click.php?tool_type=ml&amp;merchant_link_id=2efe71d3-5569-4c72-a69e-e9258881dd0a&amp;website_id=cb6aacf1-7563-4b97-8b5d-48e9519fe173\" target=\"_blank\" rel=\"noopener sponsored\"><img loading=\"lazy\" decoding=\"async\" style=\"border: 0px;\" src=\"https:\/\/classic.avantlink.com\/gbi\/bd4517b4-b0f2-4660-8208-2ade3a1fdb4c\/2efe71d3-5569-4c72-a69e-e9258881dd0a\/a24ae5c1-c37a-45ea-b3f8-5480cc46d529\/cb6aacf1-7563-4b97-8b5d-48e9519fe173\/image.png\" alt=\"\" width=\"728\" height=\"90\" \/><\/a><\/p> <p><a href=\"http:\/\/www.backroadswest.com\/blog\/map\/\">Learn more<\/a> about our maps.<\/p>\n<template> Start of our tour in Oak Glen Great view of the San Andreas Fault to the northwest Fault is oat base of mountains on the right of the road Sag pond on private property Dirt road leads into a shutter ridge - better view just up the paved road a few hundred feet San Andreas Fault crosses the road and the Mill Creek drainage Walk up paved walking trail to Greenspot Bridge This park is situated on top of the fault Dead-end of Base Line has view of fault looking east Sag pond located near grove of trees and palm trees Notice the no-mans land here where nothing was built on top of fault Modified sag pond on private property Walmart building on top of fault - possible scarp in the rear Orange Street passes by fault scarp and loop road offers great view Fault located behind buildings on Piedmont Drive Houses and Willow Drive located on top of fault Another greenspace\/park situated on top of the fault Fault crosses aqueduct near grove of eucalyptus trees Street passes thru two depressions marking San Andreas and Tokay Hill Fault <\/template>\n<h3>Comments<\/h3> <p>Read and leave comments about this post on <a href=\"https:\/\/www.youtube.com\/watch?v=uNKpsOTUqXY\" target=\"_blank\" rel=\"noopener\">YouTube<\/a>.<\/p>\n<h3>Support Us<\/h3><p>Help us fill up our tank with gas for our next trip by donating $5 and we'll bring you back more quality virtual tours of our trips!<\/p><p>Your credit card payment is safe and easy using PayPal. Click the [Donate] button to get started:<\/p><p>[paypal-donation]<\/p>\n<h3 style=\"text-align: left;\">Subscribe<\/h3> <p>[mc4wp_form]<\/p>\n<p style=\"text-align: center;\"><em>See all our comprehensive virtual tour guides at<\/em>:<\/p><p style=\"text-align: justify;\"><a title=\"BackRoadsWest\" href=\"http:\/\/www.backroadswest.com\/brw\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/BRWlogo-300x40.jpg\" alt=\"BRWlogo\" width=\"300\" height=\"40\" srcset=\"https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/BRWlogo-300x40.jpg 300w, https:\/\/www.backroadswest.com\/blog\/wp-content\/uploads\/2015\/04\/BRWlogo.jpg 438w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><br \/> <br \/> <ins style=\"display:inline-block;width:728px;height:90px\" data-ad-client=\"ca-pub-7400034802659664\" data-ad-slot=\"1662640655\"><\/ins><br \/> <\/p>\n<h3>More Trips<\/h3> Wanna see more trips in Utah? <a href=\"http:\/\/www.backroadswest.com\/blog\/category\/utah\/\"> See More Utah Trips <\/a>","_links":{"self":[{"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/posts\/6397","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/comments?post=6397"}],"version-history":[{"count":49,"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/posts\/6397\/revisions"}],"predecessor-version":[{"id":8271,"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/posts\/6397\/revisions\/8271"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/media\/6384"}],"wp:attachment":[{"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/media?parent=6397"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/categories?post=6397"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.backroadswest.com\/blog\/wp-json\/wp\/v2\/tags?post=6397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}