City Nature Challenge 2025

Come out to the park to participate in the 10th anniversary of the City Nature Challenge! Explore the park, take pictures of plants and critters, and share your findings through iNaturalist to contribute to important research that helps inform biodiversity and how humans can coexist with nature. Stop by the Field Station for park gear that can help you in your journey! 

How to participate: 

1. Download the free iNaturalist app and make an account.
2. April 25 – April 28, take photos of WILD plants and animals anywhere in the Presidio or in any of the nine Bay Area Counties (San Francisco, San Mateo, Santa Clara, Alameda, Contra Costa, Solano, Napa, Sonoma, Marin).
3. Upload your observations to share with the iNaturalist community. They will automatically be added to our San Francisco Bay Area City Nature Challenge project!
4. Learn more as your finds get identified!