Resources by California region

North Coast

• Del Norte
• Humboldt
• Mendocino
• Lake

North Mountains (Page is under construction)

• Trinity
• Siskiyou
• Modoc
• Lassen Plumas Sierra

Sacramento Valley

• Shasta
• Tehema
• Glenn
• Butte
• Colusa
• Yuba/Sutter
• Yolo
• Sacramento

San Francisco Bay Area

• Alameda
• Contra Costa
• Marin
• Napa
• San Mateo
• Santa Clara
• Solano
• Sonoma

San Joaquin Valley

• San Joaquin
• Stanislaus  
• Merced
• Madera
• Fresno
• Kings
• Tulare
• Kern 

Sierra Foothills

• Nevada
• Placer
• El Dorado
• Amador
• Calveras
• Tuolumne
• Mariposa

Central Coast

• Santa Cruz
• San Benito
• Monterey
• San Luis Obispo
• Santa Barbara

South Coast

• Ventura
• Los Angeles
• Orange
• San Diego

Eastern Desert and Mountains (Page under construction)

• Mojave
• Mono
• Inyo
• San Bernardino
• Riverside
• Imperial