Help restore and protect critical natural areas from the Marin Headlands to Bolinas Ridge.

Help restore and protect critical natural areas from the Marin Headlands to Bolinas Ridge.

Help restore and protect critical natural areas from the Marin Headlands to Bolinas Ridge.

Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Learn about how sea level rise is impacting Bothin Marsh and what One Tam is doing to help.

Join the nation's largest celebration of trails.

Learn to grow and care for native plants while helping to preserve and restore your national park.