Skip to main content

Fault Line Friday; Weird San Andreas Fault Roads between CA 198/25 and CA 41/46

By
Back in March I had a look at some of the weird roadways along the San Andreas Fault between the junction of CA 198/41 south to CA 46/41.  Specifically I traveled on; Peach Tree Road, Indian Valley Road, Slacks Canyon Road, Vineyard Canyon Road, and Cholame Road.  I started the day out by driving west on CA 198 to the overlook in the Diablos above Peach Tree Valley.  Peach Tree Valley is the boundary line between the Diablo and Gabilan Ranges which are bisected by the San Andreas Fault.


CA 198 drops sharply westbound out of the Diablos to a junction with CA 25 and Peach Tree Road.



Peach Tree Road has a center stripe and is two lanes for the first couple miles south off of CA 198 but that drops a very narrow single lane very quickly.



There is actually a couple interesting overviews of Slack Canyon that are worth stopping for.


Earlier this year Peach Tree Road was shut down while this new bridge was being put in.  The Google Street Vehicle shows the older bridge which looked to be pretty substantially narrow by comparison.



Peach Tree Road terminates here at the junction of Slacks Canyon Road and Indian Valley Road.  For whatever reason Slacks Canyon Road is been gated off and shows being that way pretty much on every GSV screen shot I looked at.  It looks like the Fault continues via Slacks Canyon Road, maybe that along with the lack of pavement was why it was closed? 



Indian Valley Road continues directly south and begins to rise through the Gabilan Range roughly to about 2,200 feet above sea level.


At the summit Indian Valley begins to drop elevation fast, I would say that this is the only section of any of the roads I traveled that had a "mountain road" feel to it.






Gradually Indian Valley Road levels out at about I want to say 1,400 feet, the descent from here on out was much more gentle.


Approaching Valleton and San Miguel there are increasing signs of residential habitation, by this point I still had not encountered another car.  I encountered seven south from this point to Vineyard Canyon Road.


Some nice bridge work near Big Sandy Road.


At the junction of Indian Valley Road and Hare Canyon Road is a community called Valleton.  Really it isn't really much of anything aside from ranch lands and a couple stray abandoned old homes.  Supposedly there was a post office here from the 1880s to almost 1920s, seems like it more or less a real place at one point.


By the time I hit junction with Hare Canyon Road I had traveled 27 miles south from CA 198.


South of Hare Canyon the roadway on Indian Valley begins to widen and basically it becomes somewhat a normal width.


 Eventually US 101 can be seen right before hitting the San Luis Obispo County Line.



 37 miles in I took an eastward swing on Vineyard Canyon Road.


 Vineyard Canyon Road is substantially wider and what I'd expect out of a modern roadway.


 Surprisingly the summit on Vineyard Canyon is pretty high at about 2,500 feet above sea level.


Approaching Slack Canyon Road and the San Andreas Fault there is some more interesting bridge work, I'm not sure what is up with the brown street blades.



The last five miles south to Parkfield-Coalinga Road and Cholame Road are pretty bland, I did make a stop in Parkfield for breakfast.


I did the rest of the Parkfield Grade from CA 198 in 2016, it is actually a pretty cool road.  The creek below is the actual fault line and there is a bow in the bridge that is obvious from outside the car.  I believe Parkfield has been around since the 1850s, there are less than 20 residents supposedly left in the town.  Parkfield is mostly known for being the most seismically active place in the Continental United States.







CA 46/41 is 17 miles of Parkfield via Cholame Road.


Cholame Road has some pretty nice single lane bridges and wide views before terminating at CA 41/46.






Comments

Post a Comment

Popular posts from this blog

Hawaii Route 8930

By
Hawaii Route 8930 is a 2.5-mile State Highway on the Island of O'hau.  Hawaii Route 8930 is aligned over Kualakai Parkway over the course of its entire alignment south from Interstate H-1 to Kapolei Parkway.  Hawaii Route 8930 is one of the newest Hawaii Routes only having been completed during 2010.   This page is part of the Gribblenation O'ahu Highways page.  All Gribblenation and Roadwaywiz media related to the highway system of O'ahu can be found at the link below: https://www.gribblenation.org/p/gribblenation-oahu-highways-page.html Part 1; the history of Hawaii Route 8930 The history of Hawaii Route 8930 is brief given it is a modern facility.  Hawaii Route 8930 and what was known as "North-South Road" were built to facilitate the developing areas of Kapolei on western O'ahu.  According to hawaiihighways.com the first stage of Hawaii Route 8930 was completed from Kapolei Parkway north to Farrington Highway as a four-lane highway during November...
Post a Comment
Read more

Madera County Road 607 and the Stockton-Los Angeles Road

By
Madera County Road 607 is an approximately seven-mile rural unsurfaced highway which spans from Road 600 near Raymond west to Road 29.   Road 607 west from Raymond Road Cemetery (established in 1905) is part of the Stockton-Los Angeles Road corridor surveyed in 1853. The corridor lies in the gap between Fresno Crossing at the Fresno River west to Newton's Crossing at the Chowchilla River. The Buchanan Copper Mine would be along what is now Road 607 in the namesake Buchanan Hollow during July 1863. The Buchanan Mine is thought to have once had a population of between 1,000-1,500 residents by the early 1870s. Copper prices would decline in the decade after the Civil War and much of the activity at Buchanan shifted towards cattle ranching. The last businesses in the community would shutter during World War II and it is now a true ghost town. Part 1; the history of Madera County Road 607 and the Stockton-Los Angeles Road What is now Road 607 was a component of the larger Sto...
Post a Comment
Read more

Old US Route 60/70 through Hell (Chuckwall Valley Road and Ragsdale Road)

By
Back in 2016 I explored some of the derelict roadways of the Sonoran Desert of Riverside County which were part of US Route 60/70; Chuckwalla Valley Road and Ragsdale Road. US 60 and US 70 were not part of the original run of US Routes in California.  According to USends.com US 60 was extended into California by 1932.  US 60 doesn't appear on the California State Highway Map until the 1934 edition. USends.com on US 60 endpoints 1934 State Highway Map Conversely US 70 was extended into California by 1934, it first appears on the 1936 State Highway Map. USends.com on US 70 endpoints 1936 State Highway Map When US 60 and US 70 were extended into California they both utilized what was Legislative Route Number 64 from the Arizona State Line west to Coachella Valley.  LRN 64 was part of the 1919 Third State Highway Bond Act routes.  The original definition of LRN 64 routed between Mecca in Blythe and wasn't extended to the Arizona State Line until 1931 acc...
3 comments
Read more