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 Route A-1, and the highest route is Imperial County Route 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 Route A-1/Eagle Lake Road
Lassen County Route A-2/Susanville Road
Tehama County Route A-5/Bowman Road
Tehama/Shasta County Route A-6/Manton Road
Tehama County Route A-7/Walnut Street/Wilder Road
This Tehama County Route A-7 shield is posted along Business Loop I-5 in Red Bluff. Tehama County Route A-7 leads west from Red Bluff along Walnut Street. Photo taken by Joel Windmiller, 03/29/01.
Tehama County Route A-8/Aramayo Way/Highway 99W
Tehama County Route A-9/Corning Road/Paskenta Road/Solano Street/South Avenue
Siskiyou County Route A-10/Everett Memorial Highway
Tehama County Route A-11/Fifth Street/Gyle Road
Siskiyou County Route A-12/99-97 Cutoff
Plumas County Route A-13 (connects California 147 and California 36 on northeastern shore of Lake Almanor)
Plumas County Route A-14/Graeagle-Johnsville Road west
Plumas County Route 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 route marker 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 Route A-14/Graeagle-Johnsville Road east
Now traveling east, Plumas County Route 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 Route A-15/Portola-McLears Road (via Gold Mountain)
Shasta County Route A-16/Placer Road
Shasta County Route A-17/Ash Creek Road/Balls Ferry Road
Shasta County Route A-18/Lake Boulevard/Toyon Avenue
Shasta County Route A-19/McArthur Road
Shasta County Route A-20/Glenburn Road
Lassen/Plumas County Route A-21/Mooney Road
Plumas County Route A-22/Arlington Road
Plumas/Sierra County Route A-23/Beckwourth Calpine Road/Westside Road
Sierra County Route A-24/Beckwith Road/Beckwourth-Loyalton Road/Sierra Valley Road
Plumas/Sierra County Route A-25/Herlong Access Road
Lassen County Route A-26/Garnier Road
Lassen County Route A-27/Center Road/Johnstonville Road
Siskiyou County Route A-28/Montague-Ager Road
Siskiyou County Route 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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