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.

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.

Help restore and maintain historic landscapes and cultural resources along the shoreline of San Francisco.

Help with vegetation management and site improvements at Sutro Heights and along the San Francisco shoreline.

Help protect endangered species and restore sensitive habitat while enjoying a day in the park.

Get ready for City Nature Challenge and celebrate the 50th anniversary of Earth Day by learning more about community (citizen) science and the importance of being a naturalist in the 21st century.