State Route 99 (SR 99) is a major north–south state highway in the U.S. state of California, stretching almost the entire length of the Central Valley. From its southern end at Interstate 5 (I-5) near Wheeler Ridge to its northern end at SR 36 near Red Bluff, SR 99 goes through the densely populated eastern parts of the valley.

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.

US 99 ran 917 miles through the heart of California. It entered the state from Oregon near Siskiyou Summit and left the state (and country) at Calexico. Prior to 1964, all California State Highways were also known internally by what were called …

State Route 99 (commonly known as Old Highway 99 or just 99) is a state highway in California, in the United States. It is about 424.85 miles (683.73 km) long, running from north to south in the Central Valley. It is parallel with Interstate 5.

US 99 ran through the heart of California. It entered the state from Oregon near Siskiyou Summit and left the state (and country) at Calexico. In between, it ran on the following course: Pacific Highway Section. Hornbrook, Yreka, Weed, Mt. Shasta City, Dunsmuir, Redding (Crossing US 299), Red Bluff. At Red Bluff, US 99 split into US 99E and US 99W.

California 99, known alternately as the Golden State Freeway and as California's Workhorse Highway (see California Transportation Journal article from 2003), is a busy corridor between Wheeler Ridge and Red Bluff through the Central Valley.

Standard California state route shields, variously identified by the state as the shape of a miner's spade, to honor the California Gold Rush, [1] and an acorn shape. [2] ... Formerly part of a longer route, US 99: SR 100: 5: 8.0 SR 1 / SR 17 near Santa Cruz: SR 1 near Santa Cruz: 1964: current Unconstructed SR 102: 37.5: 60.4 I-5 near Elkhorn:

Jan 30, 2025 · The State Route 99/120 interchange is a major regional transportation hub vital for moving people and goods throughout Northern California. Motorists living, working and traveling in San Joaquin County will be able to get where they need to be more safely and smoothly once the work is completed.

The Route 99 Corridor Enhancement Master Plan will strengthen community identity, unify freeway improvements, and develop design concepts that tie communities through the San Joaquin Valley together and foster a valley-wide identity.

1 day ago · CHICO, Calif. - Caltrans has provided an update on the closure of Highway 99. The southbound lanes have now reopened to travelers, while the northbound lanes remain closed due to flooding. Motorists are advised to use the Garner Lane to Keefer Road detour as an alternate route. Officials continue to ...