Membership extends from Bishop to Ridgecrest. The Channel Islands Chapter covers south coastal Santa Barbara County, Ventura County, and the westernmost portions of the San Fernando Valley. The Dorothy King Young Chapter covers the entire coastal area of Mendocino County and the northern coast of Sonoma County. Membership includes the communities of Jenner, Gualala, Sea Ranch, Point Arena, Mendocino and Fort Bragg. The East Bay Chapter covers the eastern Bay Area.
Membership is spread throughout the East Bay cities.
The El Dorado County Chapter covers the Sierra Foothills area around Placerville. The Kern County Chapter is centered on Bakersfield. The Los Angeles-Santa Monica Mountains Chapter has membership from throughout the Los Angeles Basin, Santa Monica Mountains and San Fernando Valley, with most from Los Angeles. The Marin Chapter covers Marin County. The Milo Baker Chapter covers Sonoma County, with membership centered on Santa Rosa.