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.

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.

Occupiers who were brought to the island by their parents between 1969 and 1971 share their perspectives of being a kid during the Occupation. In conjunction with Junior Ranger Day.

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.