Trail work in Muir Woods National Monument.

Trail & Park Improvements

Trail & Park Improvements

Caring for the Sustainability and Enjoyment of Your Parks


We help maintain 116 miles of trails and 1,439 historic structures in the parks and create new parks like the recently opened Presidio Tunnel Tops, a welcoming space built by the community, for the community.

Your parks need you now

Your support helps fight climate change and promote park sustainability—please give now.