U.S. Route 99 in California

U.S. Route 99
Pacific Highway Golden State Highway
Route information
Maintained by Caltrans
Length	754 mi (1,213 km)
Existed	1926–1972[1]
Major junctions
South end	Fed. 5 at Mexican border in Calexico[2]
Major intersections	US 80 in El Centro[2] US 60 from Indio to Beaumont, and Pomona to Los Angeles US 70 from Indio to Los Angeles US 6 / US 66 / US 101 in Los Angeles[3] US 399 / US 466 in Bakersfield US 50 from French Camp to Sacramento US 40 from Davis to Roseville US 299 in Redding
North end	US 99 at the Oregon state line
Location
Country	United States
State	California
Counties	Imperial, Riverside, San Bernardino, Los Angeles, Kern, Tulare, Fresno, Madera, Merced, Stanislaus, San Joaquin, Sacramento; Tehama, Shasta, Siskiyou
Highway system
United States Numbered Highway System List Special Divided State highways in California Interstate US State Scenic History Pre‑1964 Unconstructed Deleted Freeways
← SR 98 → SR 99

U.S. Route 99 (US 99) was the main north–south United States Numbered Highway on the West Coast of the United States until 1964, running from Calexico, California, on the Mexican border to Blaine, Washington, on the Canadian border. Known also as the "Golden State Highway" and "The Main Street of California", US 99 was an important route in California throughout much of the 1930s as a route for Dust Bowl immigrant farm workers to traverse the state. It was assigned in 1926 and existed until it was replaced for the most part by Interstate 5 (I-5). A large section in the Central Valley is now California State Route 99 (SR 99).