"CA 20" redirects here. For the congressional district, see California's 20th congressional district.
State Route 20
SR 20 highlighted in red
Route information
Maintained by Caltrans
Length
211.882 mi[1] (340.991 km)
(plus about 15.5 mi (25 km) on US 101)
History
State highway in 1910–1919; numbered in 1934
Tourist routes
Yuba-Donner Scenic Byway
Restrictions
No hazardous material along the northeast shore of Clear Lake between SR 29 and SR 53[2]
Major junctions
West end
SR 1 in Fort Bragg
Major intersections
US 101 from Willits to Calpella
SR 29 near Upper
Lake
SR 53 near Clearlake
I-5 in Williams
SR 99 in Yuba City
SR 49 from Grass Valley to Nevada City
East end
I-80 near Emigrant Gap
Location
Country
United States
State
California
Counties
Mendocino, Lake, Colusa, Sutter, Yuba, Nevada, Placer
Highway system
State highways in California
Interstate
US
State
Scenic
History
Pre‑1964
Unconstructed
Deleted
Freeways
← SR 19
→ SR 22
State Route 20 (SR 20) is a state highway in the northern-central region of the U.S. state of California, running east–west north of Sacramento from the North Coast to the Sierra Nevada. Its west end is at SR 1 in Fort Bragg, from where it heads east past Clear Lake, Colusa, Yuba City, Marysville and Nevada City to I-80 near Emigrant Gap, where eastbound traffic can continue on other routes to Lake Tahoe or Nevada.
Portions of SR 20 are built near the routing of what was first a wagon road and later a turnpike in the late 19th century. This road was extended through the state highway system all the way to Ukiah in the early 20th century, and the missing link near Clear Lake was completed in 1932 before the official designation of this highway as SR 20 in 1934. There have been subsequent improvements to the road, such as the conversion of the Grass Valley portion of the route to freeway standards.
^Cite error: The named reference trucklist was invoked but never defined (see the help page).
^"Special Route Restrictions". Caltrans. Retrieved July 28, 2014.
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Global Information
Yuba-Donner Scenic Byway
SR 1 in Fort Bragg
I-80 near Emigrant Gap
