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.

Become a Park Steward and help protect endangered species and restore sensitive habitat in Marin.

Become a Park Steward and help protect endangered species and restore sensitive habitat in Marin.

Stroll through an old-growth redwood forest at sunrise, hear tall tales, soar in the sounds and smells, and hear the historical and ecological story of Muir Woods.