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 Tehachapi Mountains. It is in the area of Tejon Pass along Interstate 5 in Kern County, California, the main route through the mountain ranges separating the Central Valley from the Los Angeles Basin and Southern California. The fort's location protected the San Joaquin Valley from the south and west.