|Elevation||4,160 ft (1,268 m)|
|Traversed by||Interstate 5|
|Location||Los Angeles and Kern counties, California|
The apex of the pass is near the northwestern-most corner of Los Angeles County, north of Gorman. Its highest point is 4,144 feet (1,263 m) or 4,160 feet (1,270 m)  (the difference arises from the altitudes of Interstate 5, and both Peace Valley Road and Gorman Post Road that run next to the freeway at the pass' apex, respectively), 75 miles (121 km) northwest of downtown Los Angeles and 47 miles (76 km) south of Bakersfield.
The pass has a gradual rise from its southern approach of 1,362 feet (415 m) at Santa Clarita, but a precipitous descent through Grapevine Canyon toward the San Joaquin Valley on the north, where it ends at Grapevine at 1,499 feet (457 m).
Historians speak of Gorman, just south of the crest of the Tejon Pass, as "one of the oldest continuously used roadside rest stops in California," because pre-Columbian indigenous Californians "would have stopped there when it was the Tataviam village of Kulshra'jek", a trading crossroads for hundreds to thousands of years.
In 1772 Pedro Fages in pursuit of deserters, crossed the pass and named it Portezuelo de Cortes (Cortes Pass). Fages also named the canyon beyond the pass leading down into the Tulare Basin, Cañada de las Uvas (Canyon of the Grapes) for all the grape vines growing in it.
In the late 18th century, El Camino Viejo, a road between Los Angeles and the Mission Santa Clara de Asis began to be used for travel north and south along the western San Joaquin Valley. It passed over the pass and turned westward up Cuddy Canyon and then down San Emigdio Creek into the San Joaquin Valley. After 1797 the road was extended to the estuary that later became the site of Oakland.
In 1806, Father Jose Maria Zalvidea, diarist for the expedition of First Lieutenant Francisco Ruiz, into the San Joaquin Valley, named the canyon, creek and pass discovered by padre Francisco Garces in 1776, "Tejon" (badger) after a dead badger found at the canyon mouth. This original Tejon Pass, (later called Old Tejon Pass), was 15 miles to the northeast of what is now Tejon Pass, in the Tehachapi Mountains, at the top of the divide between Tejon Creek Canyon in the San Joaquin Valley and Cottonwood Creek Canyon in Antelope Valley.
In 1843, Rancho Castac was established in La Cañada de las Uvas. During that same year, the first grant of Rancho Los Alamos y Agua Caliente included the pass, which was now called Portezuela de Castac (Castac Pass).
Before 1854, the route of travel into the San Joaquin Valley was directly north from Elizabeth Lake (Laguna de Chico Lopez) across the Antelope Valley, over the original Tejon Pass, into Tejon Canyon and then west along Tejon Creek into the lands of the Rancho Tejon. After the establishment of Fort Tejon and the Stockton - Los Angeles Road, the Portezuela de Castac began to be called the Fort Tejon Pass. The poor wagon route of the old Tejon Pass route was soon abandoned and the Fort Tejon Pass took the shortened name it has today. 
In 1858 the Butterfield Overland Mail stagecoach line ran through the pass. The Butterfield Overland was discontinued in 1861 but was replaced by the Telegraph Stage Line, which stopped at almost all the former stations, including Gorman's, where the horses were changed. Six of them were used for the pull up from Bakersfield to Gorman's.
The Ridge Route was the first automobile highway linking the Central Valley with the Los Angeles Basin. It was laid in a sinuous fashion through the ridges and gullies of the Sierra Pelona Mountains to Tejon Pass around 1910. The northern portion of this highway, which became a part of U.S. Route 99, was known as "The Grapevine," after the Cañada de las Uvas, the canyon through which it passed. The Ridge Route was replaced by a three-lane alternate highway in 1933, a four-lane expressway in 1947, and later by the eight-lane Interstate 5 Freeway in 1970.
Californians simply can't be trusted to drive in bad weather ... Californians also are unlikely to have snow tires.
The pass is sunny in the summer, spring, and fall, but is subject to severe weather and closure to traffic in the winter. The 40-mile stretch of Interstate 5 between Grapevine and Castaic is sometimes closed by the California Highway Patrol, generally because of the icy conditions combined with the steep grade of the pass, and the high traffic during the winter holidays. The Highway Patrol is also concerned that one accident in the snowy conditions might force traffic to slow down or come to a complete stop, leaving hundreds of vehicles to become stalled at once, especially with the number of big-rigs that pass through. Whenever there is such a closure, traffic must then either wait or endure a multi-hour detour between Bakersfield and Los Angeles (normally a two-hour drive).
This historic gap has given its name to the Mountain Communities of the Tejon Pass. Beginning on the south at Santa Clarita, it passes through Castaic, Gorman, and Lebec, to end at Grapevine. It skirts the Tejon Ranch, where two large planned communities—Centennial and Tejon Mountain Village—are proposed.
- Old Tejon Pass, old [namesake] pass located fifteen miles to the northeast
- Tehachapi Pass, used by the rail lines connecting southern and northern California
- Virtual tour of U.S. 99
- U.S. Geographic Names Information System, No. 274055
- Google page showing distance between the Tejon Pass and Los Angeles
- Google page showing distance between the Tejon Pass and Bakersfield
- U.S. Geographic Names Information System, No. 2411819
- U.S. Geographic Names Information System, No. 1660696
- Fort Tejon State Historic Park website
- Santa Clarita Valley in Pictures, "A History of Gorman," by Bonnie Ketterl Kane, March 2002. (Historian Bonnie Ketterl Kane)
- The Trail to Kashtiq.By JOHN R. JOHNSON. The Journal of California Anthropology, Winter 1978: Vol. 5, No. 2, pp. 188-198, Note 9.
- "The origin of this name can be traced back to Pedro Fages, who became California's first governor. In 1772, he was the first official Spanish visitor to enter the southern San Joaquin Valley. He called Tejon Pass the Portezuelo de Cortes apparently with an eye towards political considerations in Mexico." (Herbert E. Bolton, In the South San Joaquin Ahead of Garcés, Quarterly of the California Historical Society, Vol 10, 1931, pp.210-219; Earle Crowe, Men of El Tejon, Ward Ritchie Press, Los Angeles, 1957, p.22)]
- Harrison Irving Scott, The Ridge Route: the Long Road to Preservation; California HISTORIAN, www.californiahistorian.com website, accessed November 14, 2011 "The first white man through this area was a Spanish officer and acting governor of Alta California in 1772, Don Pedro Fages. He noticed an abundance of Cimarron grapes growing wild in the area north of what is now Gorman. He named the place Canada de Las Uvas, or Grapevine Canyon. Grapevines were so prevalent the wagoneers and soldiers had to hack their way through. Wild grapes still grow on the sides of I-5 in the pass."
- Scott, The Ridge Route..., "The name Tejon originated during an expedition in 1806 from the Santa Barbara Mission into the San Joaquin Valley led by Lieutenant Francis Ruiz. His diarist, Father Jose Maria Zalvidea, first recorded the word Tejon to designate the area. A dead badger (tejon in Spanish) had been found in the canyon. The name Tejon formerly belonged to another pass 15 miles further east."
- Diseño del Rancho Los Alamos y Agua Caliente,(Calif.) / (por Esteban Ardisson), from UC Berkeley, Bancroft Library
- Scott, The Ridge Route..., "The name Tejon formerly belonged to another pass 15 miles further east. Lieutenant Robert Stockton Williamson of the Pacific Railroad surveyed the area in 1853. His party crossed the Tehachapis by "one of the worst roads he ever saw." Hearing of a better road further west, he scouted it and found it would be far more practicable for wagons if the bulk of the traffic henceforth went that way. The name Tejon was transferred west to today's "Tejon Pass."
- Frank F. Latta, Saga of Rancho El Tejón, Santa Cruz, California: Bear State Books, 1976.
- Scott, The Ridge Route..., "There have been three Ridge Route highways. The 1915 highway...; the 1933 three-lane Ridge Alternate Highway identified as Highway 99 (in 1947 converted to a 4-lane expressway); and today's 8-lane I-5 freeway completed in 1970."
- Jorge Barrientos, "Grapevine closures: It's for our own good," The Bakersfield Californian, December 20, 2008
- "Grapevine closed by snow: playtime near L.A., but tough work on I-5". Christian Science Monitor. 2011-01-03. Retrieved 2011-01-23. "[Highway Patrol Officer John Lutz] adds that the Highway Patrol regards this short-term closure as routine: "This happens nearly every year""
- "Motorists criticize weather-related closure of the 5 Freeway in the Grapevine". Los Angeles Times. 2011-01-05. Retrieved 2011-01-23. "the California Highway Patrol on Tuesday strongly defended its decision to cut traffic off, saying that the icy road surface, steep grade of the Tejon Pass and heavy post-holiday traffic volume made the Grapevine simply too dangerous to navigate."
- "Motorists criticize weather-related closure of the 5 Freeway in the Grapevine". Los Angeles Times. 2011-01-05. Retrieved 2011-01-23. "If an accident forces traffic to slow or come to a complete stop, and snow continues to fall, hundreds of vehicles can become stalled at once. The Tejon Pass is particularly vulnerable because of its steep hills and the number of big-rigs that travel on it"
- Map and profile of the Tejon Pass : from explorations and surveys / made under the direction of the Hon. Jefferson Davis, Secretary of War by Lieut. R. S. Williamson, Topl. Engrs. assisted by Lieut. J. G. Parke, Topl. Engrs. and Mr. Isaac Williams Smith, Civ. Engr., 1853