Bay Area Hiker: Volunteer Opportunities Photo from a wildflower seed collection project at Russian RidgeVolunteer Opportunities

Volunteering has so much going for it. You get to give your time to organizations that are usually under-funded, under-staffed and over-worked, and you get to spend time outdoors learning cool stuff with neat people. To boot, you will probably sleep like a rock the night after your volunteer effort (I'm down for the count at 9:30 pm).
        Check out these links to organizations with frequent volunteer days.

Midpeninsula Regional Open Space District
Point Reyes National Seashore Volunteers in Parks
Marin County Open Space District
Santa Cruz Mountains Trail Association
San Bruno Mountain Watch
State Parks
East Bay Regional Parks
Santa Clara County Parks (click on volunteer opportunities)
• Trail Center
• Community Impact
• Volunteering at Henry W. Coe State Park
Henry W. Coe Springs Maintenance Committee
Greenbelt Alliance
Trailworkers (Santa Cruz County)
Heart of the Mountain (San Bruno Mountain Volunteers)
Restoration and Ecosystem Management Crew
Mount Tamalpais Interpretive Association
Yggdrasil Urban Wildlife Rescue (YUWR) Shelter
Volunteers for Outdoor California
Friends of Edgewood
San Mateo County Parks (click volunteers)
Bay Area Mountain Rescue Unit
Santa Clara Valley Audubon Society