California "A" County Routes


A uniform numbering system has been adopted to uniquely identify county routes across the state of California. Within this system, each route designation has a letter and number combination. The first digit is a letter, and the second and third digits are numbers. The lower letters are generally to the north of the state, and the higher numbers are generally located in the southern part of the state. The lowest route is Lassen County A-1, and the highest route is Imperial County S-80.

This page profiles the "A" series of county routes, located in the Northern California group of counties: Butte, Glenn, Lassen, Modoc, Plumas, Shasta, Siskiyou, Tehama, and Trinity.

Lassen County A-1/Eagle Lake Road
Lassen County A-2/Susanville Road
Tehama County A-5/Bowman Road
Tehama/Shasta County A-6/Manton Road
Tehama County A-7/Walnut Street/Wilder Road
This Tehama County A-7 shield is posted along Business Loop I-5 in Red Bluff. Tehama County A-7 leads west from Red Bluff along Walnut Street. Photo taken by Joel Windmiller, 03/29/01.
Tehama County A-8/Aramayo Way/Highway 99W
Tehama County A-9/Corning Road/Paskenta Road/Solano Street/South Avenue
Siskiyou County A-10/Everett Memorial Highway
Tehama County A-11/Fifth Street/Gyle Road
Siskiyou County A-12/99-97 Cutoff
Plumas County A-13 (connects California 147 and California 36 on northeastern shore of Lake Almanor)
Plumas County A-14/Graeagle-Johnsville Road west
Plumas County A-14 follows Graeagle-Johnsville Road from the California 89 intersection in the community of Graeagle west to Mohawk and Johnsville. The unincorporated community of Graeagle ("The Gift of a Lifetime") had a population of 737 people as of the 2010 Census. This A-14 reassurance shield is posted shortly after the California 89 intersection. A-14 is not a through route; it ends in Johnsville (about five miles west of Graeagle). A-14 travels for about five miles east to both Johnsville (an unincorporated community that had a population of 20 people as of the 2010 Census) and Plumas-Eureka State Park, which was established in 1959. In addition to its scenic setting in the Sierra Nevada, the park offers a glimpse into the mining history of the area, including stamp mills and a historic miner residence. Photo taken 09/04/10.
Plumas County A-14/Graeagle-Johnsville Road east
Now traveling east, Plumas County A-14/Graeagle-Johnsville Road approaches its eastern terminus at California 89 in Graeagle. A route marker and guide sign at the east end point the way to the county seat of Quincy via California 89 north and Truckee via California 89 south. Photos taken 09/04/10.
Plumas County A-15/Portola-McLears Road (via Gold Mountain)
Shasta County A-16/Placer Road
Shasta County A-17/Ash Creek Road/Balls Ferry Road
Shasta County A-18/Lake Boulevard/Toyon Avenue
Shasta County A-19/McArthur Road
Shasta County A-20/Glenburn Road
Lassen/Plumas County A-21/Mooney Road
Plumas County A-22/Arlington Road
Plumas/Sierra County A-23/Beckwourth Calpine Road/Westside Road
Sierra County A-24/Beckwith Road/Beckwourth-Loyalton Road/Sierra Valley Road
Plumas/Sierra County A-25/Herlong Access Road
Lassen County A-26/Garnier Road
Lassen County A-27/Center Road/Johnstonville Road
Siskiyou County A-28/Montague-Ager Road
Siskiyou County A-29/Big Springs Road


Back to Interstate 980  Return to the California Gateway  Continue to County Route B-2

Page Updated April 15, 2012.

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