Ridge Route
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The Ridge Route, officially the Castaic–Tejon Route, was a two-lane highway between
Los Angeles County Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the most populous county in the United States and in the U.S. state of California, with 9,861,224 residents estimated as of 2022. It is the ...
and
Kern County Kern County is a county located in the U.S. state of California. As of the 2020 census, the population was 909,235. Its county seat is Bakersfield. Kern County comprises the Bakersfield, California, Metropolitan statistical area. The county sp ...
, California. Opened in 1915 and paved with
concrete Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most wi ...
between 1917 and 1921, the road was the first paved highway directly linking the
Los Angeles Basin The Los Angeles Basin is a sedimentary basin located in Southern California, in a region known as the Peninsular Ranges. The basin is also connected to an anomalous group of east-west trending chains of mountains collectively known as the Tr ...
with the
San Joaquin Valley The San Joaquin Valley ( ; es, Valle de San Joaquín) is the area of the Central Valley of the U.S. state of California that lies south of the Sacramento–San Joaquin River Delta and is drained by the San Joaquin River. It comprises seven c ...
(southern Central Valley) over the
Tejon Pass The Tejon Pass , previously known as ''Portezuelo de Cortes'', ''Portezuela de Castac'', and Fort Tejon Pass is a mountain pass between the southwest end of the Tehachapi Mountains and northeastern San Emigdio Mountains, linking Southern Califor ...
and the rugged
Sierra Pelona Mountains The Sierra Pelona, also known as the Sierra Pelona Ridge or the Sierra Pelona Mountains, is a mountain ridge in the Transverse Ranges in Southern California. Located in northwest Los Angeles County, the ridge is bordered on the north by the San An ...
ridge south of Gorman. Much of the old road runs through the
Angeles National Forest The Angeles National Forest (ANF) of the United States Forest Service, U.S. Forest Service is located in the San Gabriel Mountains and Sierra Pelona Mountains, primarily within Los Angeles County, California, Los Angeles County in southern Calif ...
, and passes many historical landmarks, including the National Forest Inn, Reservoir Summit, Kelly's Half Way Inn, Tumble Inn, and Sandberg's Summit Hotel. North of the forest, the Ridge Route passed through Deadman's Curve before ending at
Grapevine ''Vitis'' (grapevine) is a genus of 79 accepted species of vining plants in the flowering plant family Vitaceae. The genus is made up of species predominantly from the Northern Hemisphere. It is economically important as the source of grapes, b ...
. The road was bypassed by the three-lane Ridge Route Alternate, then U.S. Route 99 (US 99), to handle increased traffic and remove curves; the Alternate in Los Angeles County was completed in 1933, and Kern County line to Grapevine in 1936. The four-lane US 99 was completed in 1953 and replaced by an eight-lane
freeway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms ...
, Interstate 5 (I-5) in 1960-70. The portion of the road in the Angeles National Forest was added to the
National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic v ...
in 1997, by the efforts of Harrison Scott. Much of the road has been closed by the
U.S. Forest Service The United States Forest Service (USFS) is an agency of the U.S. Department of Agriculture that administers the nation's 154 national forests and 20 national grasslands. The Forest Service manages of land. Major divisions of the agency in ...
; other remnants are used by local traffic.


Route description

The Ridge Route was officially the Castaic–Tejon Route. The official limits of the Ridge Route, as built in the 1910s, were SR 126 at
Castaic Junction Castaic Junction is an unincorporated community located in Los Angeles County, California. It is located at the crossroads of Interstate 5 and State Route 126 near the confluence of Castaic Creek and the Santa Clara River. Places in Castaic ...
and the bottom of the grade at
Grapevine ''Vitis'' (grapevine) is a genus of 79 accepted species of vining plants in the flowering plant family Vitaceae. The genus is made up of species predominantly from the Northern Hemisphere. It is economically important as the source of grapes, b ...
. Until 1930 the road from
San Fernando San Fernando may refer to: People *Ferdinand III of Castile (c. 1200–1252), called ''San Fernando'' (Spanish) or ''Saint Ferdinand'', King of Castile, León, and Galicia Places Argentina *San Fernando de la Buena Vista, city of Greater Buenos ...
to Castaic Junction ran through the
Newhall Tunnel Newhall Pass is a low mountain pass in Los Angeles County, California. Historically called Fremont Pass and San Fernando Pass, with Beale's Cut, it separates the Santa Susana Mountains from the San Gabriel Mountains. Although the pass was visite ...
at San Fernando Pass and along San Fernando Road, Magic Mountain Parkway (both part of SR 126 until the early 2000s) and Feedmill Road to a former bridge over the Santa Clara River. A 1930 bypass of the tunnel and Newhall through Weldon Canyon is now part of The Old Road. From Castaic Junction north to
Castaic Castaic () (Chumash: ''Kaštiq''; Spanish: ''Castéc'') is an unincorporated community in the northwestern part of Los Angeles County, California. As of the 2010 census it had a population of 19,015. For statistical purposes the Census Bureau ...
the Ridge Route has been largely buried by the Ridge Route Alternate and Interstate 5. At Castaic the Ridge Route Alternate turned northwest from the old road, now the intersection of Castaic Road and Neely Street. The first piece of Ridge Route Road out of Castaic was realigned as recently as the late 1990s when the North Lake housing development was built. The road begins to climb after passing North Lake; a portion was straightened in 1924 and now is next to the southbound lanes of I-5. In this area, known as the Five-Mile Grade, the four-lane Ridge Route Alternate became the northbound lanes of I-5, while the added four-lane alignment, built to the east (next to the old Ridge Route), had lower grades and became the southbound (downhill) lanes to cut down on runaway trucks. Two bridges were built to allow traffic to cross to the left side. Near the north end of this area, the Ridge Route curves away from the newer bypass. The road enters the
Angeles National Forest The Angeles National Forest (ANF) of the United States Forest Service, U.S. Forest Service is located in the San Gabriel Mountains and Sierra Pelona Mountains, primarily within Los Angeles County, California, Los Angeles County in southern Calif ...
about south of
Templin Highway Templin Highway is the completed part of a two-lane road project in Los Angeles County, California. The road connects Interstate 5 (California), Interstate 5 and the old Golden State Highway with the north end of Castaic Lake. The name is commonly m ...
, with the Forest Service road designation 8N04. Establishments in the forest included the National Forest Inn, Kelly's Half Way Inn, Tumble Inn, and Sandberg's Summit Hotel.
The National Forest Inn was on the west side of the road. A popular place, composed of white
clapboard Clapboard (), also called bevel siding, lap siding, and weatherboard, with regional variation in the definition of these terms, is wooden siding of a building in the form of horizontal boards, often overlapping. ''Clapboard'' in modern Americ ...
buildings, it was described in a 1932 highway beautification pamphlet as "the sort of filling station that gets into a national forest and is no addition thereto". On October 14, 1932, a fire began in the garage, and took over a day to put out. When the Ridge Route Alternate bypassed the site to the west, the inn was not rebuilt, and all that remains are concrete steps.
About north of the National Forest Inn is Serpentine Drive, where the road curves around the sides of hills as it climbs out of a low point in the route (about above sea level). North of the curves, the road passes through Swede's Cut, also called Big Cut, Culebra Excavation, or Castaic Cut. The cut was the largest on the route, with a depth of .
Reservoir Summit, also called Reservoir Hill, is above sea level. The Reservoir Summit Café was a popular high-class restaurant on the east side of the road, closed in the late 1920s; the
foundation Foundation may refer to: * Foundation (nonprofit), a type of charitable organization ** Foundation (United States law), a type of charitable organization in the U.S. ** Private foundation, a charitable organization that, while serving a good cause ...
remains. The summit was named after a now-dry reservoir, one of three probably built for the concrete used in paving the road.
Kelly's Half Way Inn was roughly halfway between Los Angeles and Bakersfield, on a small knoll with a single tree on the east side of the road; all that remains is remnants of the foundation.
The Tumble Inn, later Mountain View Lodge, was on the west side of the road, and closed when the Ridge Route Alternate opened in 1933. Steps, including the top step with "TUMBLE INN" in the concrete, and a retaining wall remain.
The Sandberg's Summit Hotel, later Sandberg's Lodge, was just north of Liebre Summit, the highest point () on the road, at above sea level. The hotel was built in 1914 and served travelers from the opening of the road in 1915. Built of logs, it was a high-class hotel. The place, which had become a ceramics factory, burned down on April 29, 1961, from a fire started by the new owner—who was converting it into a "camp-type operation" for underprivileged children—burning trash in the fireplace. The lease from the
U.S. Forest Service The United States Forest Service (USFS) is an agency of the U.S. Department of Agriculture that administers the nation's 154 national forests and 20 national grasslands. The Forest Service manages of land. Major divisions of the agency in ...
was canceled in 1963, and only portions of the foundation and a rock wall remain. The name "Sandberg" is still used by the
National Weather Service The National Weather Service (NWS) is an Government agency, agency of the Federal government of the United States, United States federal government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weathe ...
for an automated weather station a short distance to the north at Pine Canyon Road. Pine Canyon Road ( CR N2) marks the end of the forest and the beginning of county maintenance, and CR N2 uses the old Ridge Route alignment to reach SR 138 near
Quail Lake Quail Lake is an artificial lake in Los Angeles County, California. Situated in the San Andreas Fault, San Andreas Rift Zone along the north side of State Route 138 (California), State Route 138, it is a regulatory storage body for the West Bran ...
. The Ridge Route crosses the West Branch California Aqueduct with SR 138, splitting to the northwest on Gorman Post Road. It rejoins the path of I-5 at Gorman, and, from Gorman to the end at Grapevine, most of the old road has been covered by the Ridge Route Alternate or I-5. The path of the Ridge Route is now named Peace Valley Road and Lebec Road, passing over
Tejon Pass The Tejon Pass , previously known as ''Portezuelo de Cortes'', ''Portezuela de Castac'', and Fort Tejon Pass is a mountain pass between the southwest end of the Tehachapi Mountains and northeastern San Emigdio Mountains, linking Southern Califor ...
and past
Lebec Lebec is an unincorporated area, unincorporated community and census-designated place in southwestern Kern County, California. As of the 2010 United States Census, 2010 census, the population was 1,468. Geography Lebec is located in Castac Valley ...
and
Fort Tejon Fort Tejon in California is a former United States Army outpost which was intermittently active from June 24, 1854, until September 11, 1864. It is located in the Grapevine Canyon (''La Cañada de las Uvas'') between the San Emigdio Mountains and ...
. Past Fort Tejon the route descends through Grapevine Canyon to Grapevine (named for grapevines in the area). The best-known curve on the road, Deadman's Curve or Death Curve is visible from Digier Road on the west side of I-5. The next part of the old road that still exists is near the bottom of the grade, where a number of curves brought the road down to Grapevine. The original plan was to build the road nearer to the center of the canyon, but a March 1914 flood destroyed the work, and the grading was redone higher up. Deadman's Curve and the Grapevine loops were both bypassed by the Ridge Route Alternate, which was built directly over most of the old road in this area. At Grapevine the land flattens out, and the road north of Grapevine was the longest straight section of road in the state——in 1926. Most of this road lies under I-5 and SR 99, but the southernmost piece in Grapevine was bypassed by the Alternate west of it, and is now between southbound and northbound lanes of I-5.


History


Before the Ridge Route

Before the Ridge Route, roads between Los Angeles and the San Joaquin Valley were less direct. El Camino Real (Spanish, "the King's road"), the first major road in California, connected Los Angeles and the missions,
presidio A presidio ( en, jail, fortification) was a fortified base established by the Spanish Empire around between 16th century, 16th and 18th century, 18th centuries in areas in condition of their control or influence. The presidios of Captaincy Genera ...
s and settlements with
San Francisco San Francisco (; Spanish language, Spanish for "Francis of Assisi, Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the List of Ca ...
and Sonoma. The San Joaquin Valley route split from the El Camino Real at present-day Universal City, the western leg running along the
Pacific Coast Pacific coast may be used to reference any coastline that borders the Pacific Ocean. Geography Americas Countries on the western side of the Americas have a Pacific coast as their western or southwestern border, except for Panama, where the Pac ...
and coastal valleys and the eastern
El Camino Viejo El Camino Viejo a Los Ángeles ( en, the Old Road to Los Angeles), also known as El Camino Viejo and the Old Los Angeles Trail, was the oldest north-south trail in the interior of Spanish colonial Las Californias (1769–1822) and Mexican Alta Cal ...
, (Spanish, "the old road") via the San Joaquin Valley to San Antonio, now
East Oakland East Oakland is a geographical region of Oakland, California, United States, that stretches between Lake Merritt in the northwest and San Leandro in the southeast. As the southeastern portion of the city, East Oakland takes up the largest portio ...
. Another route between Los Angeles and Bakersfield followed the southern approach to the Ridge Route to Saugus, but took a longer route between Saugus and Gorman, heading northeast through the
San Francisquito Canyon San Francisquito Canyon is a canyon created through erosion of the Sierra Pelona Mountains by the San Francisquito Creek, in Los Angeles County, Southern California. Geography The canyon cuts through the Sierra Pelona Mountains, which are centr ...
to the
Antelope Valley The Antelope Valley is located in northern Los Angeles County, California, and the southeast portion of Kern County, California, and constitutes the western tip of the Mojave Desert. It is situated between the Tehachapi, Sierra Pelona, and the ...
and west to Gorman. The rest of the route, from Gorman toward Bakersfield via the Tejon Pass, followed the same path as the Ridge Route. The
Butterfield Overland Stage Butterfield Overland Mail (officially the Overland Mail Company)Waterman L. Ormsby, edited by Lyle H. Wright and Josephine M. Bynum, "The Butterfield Overland Mail", The Huntington Library, San Marino, California, 1991. was a stagecoach service i ...
, the first overland mail service to California, went from
Tipton Tipton is an industrial town in the West Midlands in England with a population of around 38,777 at the 2011 UK Census. It is located northwest of Birmingham. Tipton was once one of the most heavily industrialised towns in the Black Country, w ...
,
Missouri Missouri is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Ranking List of U.S. states and territories by area, 21st in land area, it is bordered by eight states (tied for the most with Tennessee ...
and
Memphis Memphis most commonly refers to: * Memphis, Egypt, a former capital of ancient Egypt * Memphis, Tennessee, a major American city Memphis may also refer to: Places United States * Memphis, Alabama * Memphis, Florida * Memphis, Indiana * Memp ...
to San Francisco via Los Angeles. From October 1858, when the first stage passed through Tejon Pass, until April 1861, the route was identical to El Camino Viejo, running via San Francisquito Canyon. In order to keep the stages from running directly northwest from
San Bernardino San Bernardino (; Spanish language, Spanish for Bernardino of Siena, "Saint Bernardino") is a city and county seat of San Bernardino County, California, United States. Located in the Inland Empire region of Southern California, the city had a ...
and bypassing Los Angeles, the
Los Angeles County Board of Supervisors The Los Angeles County Board of Supervisors (LACBOS) is the five-member governing body of Los Angeles County, California, United States. History On April 1, 1850 the citizens of Los Angeles elected a three-man Court of Sessions as their first ...
spent $8000 in 1858 (about $ in ) to deepen the cut—later Beale's Cut—at San Fernando Pass, south of Saugus and Newhall (east of Sierra Highway, west of the Antelope Valley Freeway or State Route 14). The path followed by the stages was changed to pass along the Pacific Coast from Los Angeles in April 1861. Similarly, the residents of the City of Los Angeles approved the expenditure of a good deal of money towards the building of the
Southern Pacific Railroad The Southern Pacific (or Espee from the railroad initials- SP) was an American Class I railroad network that existed from 1865 to 1996 and operated largely in the Western United States. The system was operated by various companies under the ...
, which had originally planned to bypass the city. The line to San Francisco, including the San Fernando Tunnel through San Fernando Pass, was completed on September 5, 1876. The railroad's route between Saugus and Bakersfield was even longer than that of El Camino Viejo and the Butterfield Overland Stage, heading east through
Soledad Canyon Soledad Canyon is a long narrow canyon/valley located in Los Angeles County, California between the cities of Palmdale and Santa Clarita. It is a part of the Santa Clara River Valley, and extends from the top of Soledad Pass to the open plain of ...
before turning north via
Palmdale Palmdale is a city in northern Los Angeles County in the U.S. state of California. The city lies in the Antelope Valley region of Southern California. The San Gabriel Mountains separate Palmdale from the Los Angeles Basin to the south. On Aug ...
to Mojave and northwest over
Tehachapi Pass Tehachapi Pass (Kawaiisu: ''Tihachipia'', meaning "hard climb") is a mountain pass crossing the Tehachapi Mountains in Kern County, California. Traditionally, the pass marks the northeast end of the Tehachapis and the south end of the Sierra Neva ...
. In the 1910s several power companies built lines through the area. The
General Pipe Line Company Mobil is a petroleum brand owned and operated by American oil and gas corporation ExxonMobil. The brand was formerly owned and operated by an oil and gas corporation of the same name, which itself merged with Exxon to form ExxonMobil in 1999. ...
completed an
oil pipeline Pipeline transport is the long-distance transportation of a liquid or gas through a system of pipes—a pipeline—typically to a market area for consumption. The latest data from 2014 gives a total of slightly less than of pipeline in 120 countr ...
connecting the San Joaquin Valley's
Midway-Sunset Oil Field The Midway-Sunset Oil Field is a large oil field in Kern County, San Joaquin Valley, California in the United States. It is the largest known oilfield in California and the third largest in the United States. The field was discovered in 1894, ...
with the port at San Pedro in 1913. Its alignment followed the Ridge Route north of Gorman and south of Reservoir Summit, a longer distance than any of the earlier transportation routes, but from Gorman south to the present location of Pyramid Lake, where it turned east to Reservoir Summit, it roughly followed the later Ridge Route Alternate. That same year, the Midway Gas Company opened a natural gas line, and the
Pacific Light and Power Company Southern California Edison (or SCE Corp), the largest subsidiary of Edison International, is the primary electricity supply company for much of Southern California. It provides 15 million people with electricity across a service territory of app ...
opened a
power line An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy across large distances. It consists of one or more uninsulated electrical cables (commonly multiples of three for three-p ...
, both staying fairly close to the entire Ridge Route. The two general routes followed by the Butterfield Overland Stage and the Southern Pacific Railroad—known respectively as the Tejon Pass Route and the Tehachapi or Midway Route—were the main
automobile A car or automobile is a motor vehicle with Wheel, wheels. Most definitions of ''cars'' say that they run primarily on roads, Car seat, seat one to eight people, have four wheels, and mainly transport private transport#Personal transport, pe ...
routes between Los Angeles and the San Joaquin Valley around the start of the 20th century. The State Bureau of Highways recommended in 1895 that a more direct route be built to shorten this distance. A
bond issue In finance, a bond is a type of security under which the issuer (debtor) owes the holder (creditor) a debt, and is obliged – depending on the terms – to repay the principal (i.e. amount borrowed) of the bond at the maturity date as well as i ...
was approved in 1909 and 1910 to build a
state highway A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either ''numbered'' or ''maintained'' by a sub-national state or province. A road numbered by a ...
system, including the Ridge Route. The new
California Highway Commission The California Highway Commission was established in 1895 and continued until 1978 as the primary state highway bureaucracy in California. Their first noticeable efforts centered on the Lake Tahoe Wagon Road (eventually to become U.S. Route 50) ove ...
was unable to raise funds in the
East East or Orient is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth. Etymology As in other languages, the word is formed from the fa ...
, but Los Angeles again contributed funds to ensure that construction would go forward. These routes all shared the roadway south of Saugus, which was generally flat but included the crossing of San Fernando Pass. As discussed earlier, this was deepened at the county's expense in 1858. The
California State Legislature The California State Legislature is a bicameral state legislature consisting of a lower house, the California State Assembly, with 80 members; and an upper house, the California State Senate, with 40 members. Both houses of the Legisla ...
authorized a
turnpike Turnpike often refers to: * A type of gate, another word for a turnstile * In the United States, a toll road Turnpike may also refer to: Roads United Kingdom * A turnpike road, a principal road maintained by a turnpike trust, a body with powers ...
in 1861, and it was completed in 1863, then owned by
Edward Fitzgerald Beale Edward Fitzgerald "Ned" Beale (February 4, 1822 – April 22, 1893) was a national figure in the 19th-century United States. He was a naval officer, military general, explorer, frontiersman, Indian affairs superintendent, California rancher, ...
. The cut, which came to be known as Beale's Cut, was deepened by Beale, and lowered once more by the county in 1904. To improve the crossing, the county bypassed the cut with the narrow
Newhall Tunnel Newhall Pass is a low mountain pass in Los Angeles County, California. Historically called Fremont Pass and San Fernando Pass, with Beale's Cut, it separates the Santa Susana Mountains from the San Gabriel Mountains. Although the pass was visite ...
, for railroad traffic only, which opened in October 1910.


Construction

The California Highway Commission considered several easterly routes between Saugus and Gorman:
Soledad Canyon Soledad Canyon is a long narrow canyon/valley located in Los Angeles County, California between the cities of Palmdale and Santa Clarita. It is a part of the Santa Clara River Valley, and extends from the top of Soledad Pass to the open plain of ...
(used by the Southern Pacific) had frequent washouts; Mint Canyon (used by the Midway Route) was too long and cost too much; Bouquet Canyon (used by both automobile routes) had bad drainage; and
San Francisquito Canyon San Francisquito Canyon is a canyon created through erosion of the Sierra Pelona Mountains by the San Francisquito Creek, in Los Angeles County, Southern California. Geography The canyon cuts through the Sierra Pelona Mountains, which are centr ...
(used by the Tejon Pass Route) was steep and narrow. Another possible route, through Piru Canyon to the west, was rejected because of a proposal for a dam. This route was later chosen for the ''Ridge Route Alternate'', but had to be abandoned in the 1970s due to the construction of Pyramid Lake. The route chosen was direct from Saugus to Gorman, over the top of the ridge for many miles. Due to cost and drainage concerns, and a desire to reduce altering the terrain, the road was built with 697 curves, high in the mountains. Construction on the Ridge Route, officially considered to run from Castaic Junction (west of Saugus on the road to Ventura) to the bottom of the grade at
Grapevine ''Vitis'' (grapevine) is a genus of 79 accepted species of vining plants in the flowering plant family Vitaceae. The genus is made up of species predominantly from the Northern Hemisphere. It is economically important as the source of grapes, b ...
, began in 1914. The highway was one of the earliest projects completed by the California Highway Commission. Horse-drawn scrapers were used. The new road, designed with an ideal
grade Grade most commonly refers to: * Grade (education), a measurement of a student's performance * Grade, the number of the year a student has reached in a given educational stage * Grade (slope), the steepness of a slope Grade or grading may also ref ...
of 6 percent (but with several 7 percent grades, including at Grapevine,) cut the distance by over the Tejon Pass Route or over the Midway Route. A
speed limit Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed - expres ...
of was enforced between Castaic and Quail Lake, making the trip from Los Angeles to Bakersfield take about 12 hours. On the Ridge Route between Castaic Junction and Grapevine, the curves added up to about 109.5 complete circles, with a minimum
radius In classical geometry, a radius ( : radii) of a circle or sphere is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length. The name comes from the latin ''radius'', meaning ray but also the ...
of . The unpaved road, which had cost $450,000 (about $ in ), opened in October 1915. In addition to being part of the state highway system (as a portion of the unsigned
Sacramento ) , image_map = Sacramento County California Incorporated and Unincorporated areas Sacramento Highlighted.svg , mapsize = 250x200px , map_caption = Location within Sacramento ...
-Los Angeles Legislative Route 4), the road was part of the
National Park to Park Highway The National Park to Park Highway was an auto trail in the United States in the 1910s and 1920s, plotted by A. L. Westgard. It followed a large loop through the U.S. West, West, connecting twelve National Park (US), National Parks: *Rocky Mountai ...
, a privately designated
auto trail The system of auto trails was an informal network of marked routes that existed in the United States and Canada in the early part of the 20th century. Marked with colored bands on utility poles, the trails were intended to help travellers in ...
, and became part of
US 99 U.S. Route 99 (US 99) was a main north–south United States Numbered Highway on the West Coast of the United States until 1964, running from Calexico, California, on the US–Mexico border to Blaine, Washington, on the U.S.-Canada borde ...
in 1926. The continuation south via Saugus and the Newhall Tunnel towards Los Angeles, also part of Route 4, was added to the state highway system in 1917. The ''
San Francisco Chronicle The ''San Francisco Chronicle'' is a newspaper serving primarily the San Francisco Bay Area of Northern California. It was founded in 1865 as ''The Daily Dramatic Chronicle'' by teenage brothers Charles de Young and M. H. de Young, Michael H. de ...
'' called the new route "one of the most remarkable engineering feats accomplished by the State Highway Commission. It is Southern California's Magnus Opus 'sic''.html" ;"title="sic.html" ;"title="'sic">'sic''">sic.html" ;"title="'sic">'sic''in mountain highway construction." It was also credited with stopping efforts to split California into two states, by linking its two halves over the rugged terrain separating them. Work on paving the Ridge Route with thick reinforced concrete began in 1917, but was delayed until 1919 by the U.S. entry into World War I. During work on the road, traffic was Detour (road), detoured via Mint and Bouquet Canyons. The road reopened on November 15, 1919, completely paved except north of Lebec, including the grade at Grapevine, which was only oiled. After a
bond issue In finance, a bond is a type of security under which the issuer (debtor) owes the holder (creditor) a debt, and is obliged – depending on the terms – to repay the principal (i.e. amount borrowed) of the bond at the maturity date as well as i ...
was passed in July 1919, this portion was paved from September 1919 to May 1921; the dangerous detour during the paving included a 20 percent grade. The paving added about $1 million to the cost, for a total price of about $1.5 million (about $ in ), which was not paid off until 1965.
Asphalt Asphalt, also known as bitumen (, ), is a sticky, black, highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or may be a refined product, and is classed as a pitch. Before the 20th century, the term a ...
was added on top of the concrete for south from Swede's Cut in 1922, and in 1924 a number of blind curves were widened and straightened.


Bypasses and the fate of the bypassed road

In 1929 the state decided to build a new bypass of the central portion through Piru Canyon, and to upgrade the north portion over Tejon Pass and down the hill to Grapevine. This Ridge Route Alternate, or Ridge Alternate Highway, shortened the route by and increased the minimum curve radius from . This was done for the safety of the road, which had many accidents, and to increase the road's capacity. The old highway was to be relinquished to Los Angeles County and incorporated into the county road system. Construction began in 1930, and the road south of Tejon Pass opened on October 29, 1933; replacement of the Grapevine grade was completed in 1936. The three-lane road, with a center "suicide" passing lane, cost $3.5 million (about $ in ), paid for by the state
gas tax A fuel tax (also known as a petrol, gasoline or gas tax, or as a fuel duty) is an excise tax imposed on the sale of fuel. In most countries the fuel tax is imposed on fuels which are intended for transportation. Fuels used to power agricultural v ...
. It was estimated that it would pay itself off in 2.5 years with the savings in time and gas. A new bypass of the
Newhall Tunnel Newhall Pass is a low mountain pass in Los Angeles County, California. Historically called Fremont Pass and San Fernando Pass, with Beale's Cut, it separates the Santa Susana Mountains from the San Gabriel Mountains. Although the pass was visite ...
, through Weldon Canyon, had opened on May 28, 1930, giving drivers a better route all the way from Los Angeles to Bakersfield. The roadway was widened to an
expressway Expressway may refer to: * Controlled-access highway, the highest-grade type of highway with access ramps, lane markings, etc., for high-speed traffic. * Limited-access road, a lower grade of highway or arterial road. *Expressway, the fictional s ...
by 1952 at a cost of $13.5 million (about $ in ), with two lanes in each direction and a center
median In statistics and probability theory, the median is the value separating the higher half from the lower half of a data sample, a population, or a probability distribution. For a data set, it may be thought of as "the middle" value. The basic fe ...
, but still with
at-grade intersection An intersection or an at-grade junction is a junction where two or more roads converge, diverge, meet or cross at the same height, as opposed to an interchange, which uses bridges or tunnels to separate different roads. Major intersections a ...
s. Even this four-lane Ridge Route Alternate was not adequate for the traffic, and the first section of eight-lane
freeway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms ...
I-5 with a minimum curve radius of opened in 1960. Large parts of the Ridge Route Alternate were incorporated into the new roadway, but the area through the present Pyramid Lake was completely bypassed. I-5 over the mountains between Castaic Junction and Grapevine was completed on August 24, 1970, at a cost of $103 million (about $ in ). Portions of the old road continued to exist as a county road. The longest preserved segment was the part bypassed by the Ridge Route Alternate, between
Castaic Castaic () (Chumash: ''Kaštiq''; Spanish: ''Castéc'') is an unincorporated community in the northwestern part of Los Angeles County, California. As of the 2010 census it had a population of 19,015. For statistical purposes the Census Bureau ...
and SR 138 near
Sandberg Sandberg may refer to: People * Sandberg (surname) Places * Sandberg, Bavaria - municipality in the district of Rhön-Grabfeld in Bavaria in Germany * Sandberg (Celtic settlement) - archaeological site on hill ridge in the northwestern part of t ...
, including the portion through the
Angeles National Forest The Angeles National Forest (ANF) of the United States Forest Service, U.S. Forest Service is located in the San Gabriel Mountains and Sierra Pelona Mountains, primarily within Los Angeles County, California, Los Angeles County in southern Calif ...
. The road for about south from SR 138 is part of CR N2. Harrison Scott, a retired engineer, was traveling north on I-5 with his son in 1991, when his son speculated about the difficulty of driving over the first road through the rugged terrain. Having some extra time, and recalling a drive on the old road in 1955, they left the freeway and traveled along most of the abandoned section. Near SR 138, Scott asked a county road crew which was resurfacing the road if it was still maintained by the county, and the crew replied that they didn't know who maintained it through the desert. It turned out that the county officially owned it but did not maintain it; Scott has since convinced the county and forest to exchange ownership with the Santa Anita Canyon Road, then a county road. For the next six years Scott worked to get the road added to the
National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic v ...
, and finally succeeded when, on September 25, 1997, the
National Park Service The National Park Service (NPS) is an agency of the United States federal government within the U.S. Department of the Interior that manages all national parks, most national monuments, and other natural, historical, and recreational propertie ...
added the in the forest to the National Register. He later used his research for the National Register application to write a book, ''Ridge Route: The Road That United California'', published in 2002. The Ridge Route was also designated as a California Historic Civil Engineering Landmark by the
American Society of Civil Engineers American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, pe ...
in 2008. The route was repaired in 2005 following heavy rainfall, but the road was not reopened , due to objections from Angeles National Forest officials.


Major intersections


See also

* *
1857 Fort Tejon earthquake The 1857 Fort Tejon earthquake occurred at about 8:20 a.m. (Pacific time) on January 9 in central and Southern California. One of the largest recorded earthquakes in the United States, with an estimated moment magnitude of 7.9, it ruptured ...
*
Mountain Communities of the Tejon Pass The Mountain Communities of the Tejon Pass, or the Frazier Mountain Communities, in the San Emigdio Mountains is a region of California that includes Lebec, Frazier Park, Lake of the Woods, Pinon Pines, and Pine Mountain Club, in Kern Count ...


References


Further reading

*


External links


Ridge Route Preservation Organization

Harrison Scott's Ridge Route Site
(includes information on the roadway as well as a book for sale)
Historic Highway 99 Association of California


(includes detailed history of the Ridge Route Alternate and Interstate 5)
Virtual Tour of the Ridge Route
(includes detailed history of the Ridge Route Alternate and Interstate 5) * (mostly old postcards) * {{featured article Named highways in California Roads in Los Angeles County, California History of Los Angeles County, California National Register of Historic Places in Los Angeles County, California Roads on the National Register of Historic Places in California San Emigdio Mountains Sierra Pelona Ridge U.S. Route 99 Former state highways in California