Angeles Chapter Sierra Club - Outdoor and environmental group based in Los Angeles Orange County California. Provides information and local activities including interests for 20s and 30s singles.

Loma Prieta Chapter of the Sierra Club - Outdoor and environmental group. Serves San Benito Santa Clara and San Mateo counties in California. Provides information and local activities.

Redwood Chapter of the Sierra Club - Outdoor recreation and environmental group covering northern coastal California from San Francisco to the Oregon border. Includes five regional groups: the Sonoma Napa Solano Mendocino-Lake and the North Group. Provides information and local activities.

San Diego Chapter of the Sierra Club - Environmental activist and outdoor preservation group based in San Diego California. Provides information and local activities.