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.

Links:
Midpeninsula Regional Open Space District http://www.openspace.org/volunteer/
City of Palo Alto http://www.cityofpaloalto.org/gov/depts/csd/parks/preserves/volunteering.asp
Point Reyes National Seashore Volunteers in Parks http://www.nps.gov/pore/getinvolved/volunteer.htm
Marin County Open Space District http://www.marincountyparks.org/depts/pk/programs/volunteer
Santa Cruz Mountains Trail Association http://www.scmta-trails.org
• GGNRA http://www.nps.gov/goga/supportyourpark/volunteer.htm
San Bruno Mountain Watch http://www.mountainwatch.org/volunteer/
State Parks http://www.parks.ca.gov/default.asp?page_id=886
East Bay Regional Parks http://www.ebparks.org/about/getinvolved
Santa Clara County Parks https://www.sccgov.org/sites/parks/Volunteer/Pages/GetInvolved.aspx
Friends of Huddart & Wunderlich Parks
• 
Trail Center http://www.trailcenter.org/volunteer.htm
• Volunteering at Henry W. Coe State Park http://coepark.net/pineridgeassociation/support-coe/ununifomed-volunteer-program
Trailworkers (Santa Cruz County) http://www.trailworkers.org
Friends of Mount Tam http://www.friendsofmttam.org/be-a-friend/volunteer.html
Yggdrasil Urban Wildlife Rescue (YUWR) Shelter http://yuwr.org/volunteer/
Volunteers for Outdoor California http://v-o-cal.org/
One Tam http://www.onetam.org/volunteer
Friends of Edgewood http://www.friendsofedgewood.org/get-involved
San Mateo County Parks http://parks.smcgov.org/volunteers
Bay Area Mountain Rescue Unit http://www.bamru.org/
Santa Clara Valley Audubon Society http://www.scvas.org/index.php?page=text&id=getinvolved
Save the Bay http://www.savesfbay.org/volunteering
Acterra http://www.acterra.org/programs/stewardship/get_involved.html