State Route 138 (SR 138) is an east–west

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 ...

in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sover ...

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

that generally follows the northern foothills of the

San Gabriel Mountains The San Gabriel Mountains ( es, Sierra de San Gabriel) are a mountain range located in northern Los Angeles County, California, Los Angeles County and western San Bernardino County, California, United States. The mountain range is part of the Tr ...

and the western

Mojave Desert The Mojave Desert ( ; mov, Hayikwiir Mat'aar; es, Desierto de Mojave) is a desert in the rain shadow of the Sierra Nevada mountains in the Southwestern United States. It is named for the indigenous Mojave people. It is located primarily in ...

. The scenic highway begins in the west at its junction with

Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Califor ...

located south of Gorman in the

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 ...

, continues eastward through 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

Cajon Pass Cajon Pass (; Spanish: ''Puerto del Cajón'' or ''Paso del Cajón'') is a mountain pass between the San Bernardino Mountains to the east and the San Gabriel Mountains to the west in Southern California. Created by the movements of the San Andreas ...

, to its junction with State Route 18 in the east, located in the

San Bernardino Mountains The San Bernardino Mountains are a high and rugged mountain range in Southern California in the United States. Situated north and northeast of San Bernardino and spanning two California counties, the range tops out at at San Gorgonio Mountain � ...

south of Crestline. Except for the western of the route between Interstate 5 and just east of Gorman Post Road and a segment shared with State Route 14 between Avenue D in Lancaster and

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 ...

Boulevard in Palmdale, it is all a mostly undivided two-lane surface road. The remaining section of the

Ridge Route The Ridge Route, officially the Castaic–Tejon Route, was a two-lane highway between Los Angeles County and Kern County, California. Opened in 1915 and paved with concrete between 1917 and 1921, the road was the first paved highway directly ...

, California's first highway connecting 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 ...

to 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 ...

, ends at Route 138 near Gorman.

Route description

The western leg of State Route 138 traverses the Lancaster Freeway from Interstate 5 to Gorman Post Road, Lancaster Road from Gorman Post Road to 245th Street West near Neenach School, and Avenue D from 245th Street West to Route 138's north junction with State Route 14. The Lancaster Freeway has four lanes, two for each direction of travel. Both Lancaster Road and Avenue D are 2-lane conventional roads; Avenue D is on a straight alignment over its between 245th Street West and State Route 14. After its co-routing with the Antelope Valley Freeway (SR 14) for approximately through Lancaster and

, it passes through Palmdale's eastside as four-lane Palmdale Boulevard, 47th Street East, and Fort Tejon Road to Avenue T. At Avenue T it tapers to two lanes and continues straight ahead on Pearblossom Highway through Littlerock, Pearblossom, and Llano to its west junction with State Route 18. Route 18's western terminus siphons off

Las Vegas Las Vegas (; Spanish for "The Meadows"), often known simply as Vegas, is the 25th-most populous city in the United States, the most populous city in the state of Nevada, and the county seat of Clark County. The city anchors the Las Vegas ...

-bound travelers from 138. At its west junction with State Route 18, State Route 138 turns southeast on Antelope Highway to the

Los Angeles Los Angeles ( ; es, Los Ángeles, link=no , ), often referred to by its initials L.A., is the largest city in the state of California and the second most populous city in the United States after New York City, as well as one of the world' ...

San Bernardino County San Bernardino County (), officially the County of San Bernardino, is a county located in the southern portion of the U.S. state of California, and is located within the Inland Empire area. As of the 2020 U.S. Census, the population was 2,181, ...

line where it loses its alternative name, Antelope Highway. Between the county line and

Interstate 15 Interstate 15 (I-15) is a major Interstate Highway System, Interstate Highway in the western United States, running through Southern California and the Intermountain West. I-15 begins near the Mexico–United States border, Mexican border i ...

, State Route 138 traverses very mountainous and scenic terrain and it connects with State Route 2 that leads to winter resort areas in the

used largely by residents of the

Los Angeles metropolitan area Greater Los Angeles is the second-largest metropolitan region in the United States with a population of 18.5 million in 2021, encompassing five counties in Southern California extending from Ventura County in the west to San Bernardino Coun ...

. State Route 138 then descends through the West Cajon Valley and crosses

in the

. From

to State Route 173, near the northwest corner of

Silverwood Lake Silverwood Lake is a large reservoir in San Bernardino County, California, United States, located on the West Fork Mojave River, a tributary of the Mojave River in the San Bernardino Mountains. It was created in 1971 as part of the State Water P ...

, traffic on State Route 138 is rather sparse. The remaining road past Silverwood Lake is mountainous, narrow, and twisting, and not a prime mountain route to the San Bernardino Mountain resorts. The entire segment from Interstate 15 to the eastern terminus of State Route 138 at Mount Anderson Junction is known as the El Cajon-Skyline Forest Highway. State Route 138 and 18 overlap each other in opposing termini, as SR 18's northwest most endpoint is in Llano with SR 138, while SR 138's southmost point is in Crestline with SR 18. Because of its twisting, mountainous segments and overloaded traffic conditions on its eastern leg, State Route 138 east of Palmdale and west of Interstate 15 is the site of numerous serious auto accidents as of 2004, according to CHP data. One of the chief contributors to accidents on Route 138 of late is drivers passing on the two-lane highway in unsafe conditions. A notable accident in 2003 involved a pickup truck driven by an unlicensed driver leaving the roadway and plunging into the

California Aqueduct The Governor Edmund G. Brown California Aqueduct is a system of canals, tunnels, and pipelines that conveys water collected from the Sierra Nevada Mountains and valleys of Northern and Central California to Southern California. Named after Cali ...

, killing four occupants of the vehicle and leaving the sole survivor quadriplegic. The State of California paid a $10 million settlement to the victims' family. The area surrounding the highway is also prone to brush fires and flash floods. SR 138 is part of the

California Freeway and Expressway System The California Freeway and Expressway System is a system of existing or planned freeways and expressways in the U.S. state of California. It encompasses both State highways and federal highways in California. It is defined by Article 2 (commenci ...

, and west of the western junction of SR 18 is part of the National Highway System, a network of highways that are considered essential to the country's economy, defense, and mobility by the

Federal Highway Administration The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two programs, the Federal-aid Highway Program a ...

. SR 138 is eligible to be included in the State Scenic Highway System, but it is not officially designated as a scenic highway by the

California Department of Transportation The California Department of Transportation (Caltrans) is an executive department of the U.S. state of California. The department is part of the cabinet-level California State Transportation Agency (CalSTA). Caltrans is headquartered in Sacrame ...

. The segment of SR 138 from I-15 in the Cajon Pass to SR 18 at Crestline is designated as part of the

Rim of the World Scenic Byway The Rim of the World Scenic Byway is an National Forest Scenic Byway through the San Bernardino National Forest in the U.S. state of California. It consists of the following routes: *California State Route 138 from near the Cajon Pass to near Cres ...

, a National Forest Scenic Byway.

Future

A project to widen the highway to four lanes and add shoulders between Avenue T in Palmdale and Highway 18 in Llano was announced by the

(Caltrans) in 2009. Work was projected to be completed by Spring 2012. However, as of December 2012, work on the project was still ongoing and several portions remain two lanes. Improvements to the stretch between Highway 18 and the Los Angeles/San Bernardino County Line, including widening the shoulders and installing rumble strips, were proposed in February 2013, with no timeline for completion being given. A proposed bypass to the north of downtown Palmdale has been studied by

Caltrans The California Department of Transportation (Caltrans) is an Executive (government), executive department of the U.S. state of California. The department is part of the Government of California#State agencies, cabinet-level California State Tran ...

. The bypass would be located east of the

Antelope Valley Freeway The term antelope is used to refer to many species of even-toed ruminant that are indigenous to various regions in Africa and Eurasia. Antelope comprise a wastebasket taxon defined as any of numerous Old World grazing and browsing hoofed mammals ...

and south of

LA/Palmdale Regional Airport : ''See: United States Air Force Plant 42 for the United States Government use of the facility'' Palmdale Regional Airport is an airport in Palmdale, California, United States. The city of Palmdale took over the airport at the end of 2013, mana ...

along Avenue P-8, reconnecting with the current SR 138 east of Palmdale. Caltrans plans to build a freeway and transit corridor parallel to State Route 138 and State Route 18, known as the "High Desert Corridor". The $8 billion project would include an eight-lane freeway between Lancaster and Victorville, along with a bikeway,

rapid transit Rapid transit or mass rapid transit (MRT), also known as heavy rail or metro, is a type of high-capacity public transport generally found in urban areas. A rapid transit system that primarily or traditionally runs below the surface may be c ...

, and part of

Brightline West Brightline West is a proposed privately run high-speed rail route linking Las Vegas Valley and Rancho Cucamonga in the Greater Los Angeles area through the High Desert (California), California high desert. The line will connect with existing ra ...

, a proposed

high-speed rail High-speed rail (HSR) is a type of rail system that runs significantly faster than traditional rail, using an integrated system of specialised rolling stock and dedicated tracks. While there is no single standard that applies worldwide, lines ...

line linking Los Angeles to Las Vegas. However, Caltrans put the freeway on hold in 2019.

Major intersections

In popular culture

Parts of the distinctive highway were used in the filming of the movie ''

The Long, Long Trailer ''The Long, Long Trailer'' is a 1954 American Anscocolor road comedy film based on a novel of the same name written by Clinton Twiss in 1951 about a couple who buy a new travel trailer home and spend a year traveling across the United States.''V ...

'', a 1954 comedy with

Lucille Ball Lucille Désirée Ball (August 6, 1911 – April 26, 1989) was an American actress, comedienne and producer. She was nominated for 13 Primetime Emmy Awards, winning five times, and was the recipient of several other accolades, such as the Golden ...

and

Desi Arnaz Desiderio Alberto Arnaz y de Acha III (March 2, 1917 – December 2, 1986) was a Cuban-born American actor, bandleader, and film and television producer. He played Lucy and Ricky Ricardo, Ricky Ricardo on the American television sitcom ''I Lov ...

. Despite the rapid growth of Southern California in the ensuing fifty years, the segment shown in the movie is little changed since the movie was filmed.

David Hockney David Hockney (born 9 July 1937) is an English painter, draftsman, printmaker, stage designer, and photographer. As an important contributor to the pop art movement of the 1960s, he is considered one of the most influential British artists o ...

composed the picturesque photographic collage ''Pearblossom Highway in 1986'' off the segment of Route 138 bearing that moniker. It may be viewed at the

Getty Museum The J. Paul Getty Museum, commonly referred to as the Getty, is an art museum in Los Angeles, California housed on two campuses: the Getty Center and Getty Villa. The Getty Center is located in the Brentwood neighborhood of Los Angeles and fe ...

References

External links