Join in the 2026 City Nature Challenge in the San Francisco Bay Area, April 24- April 27 and take part the annual celebration of the incredible nature we have in the Bay Area, from our backyards to our city streets to our open spaces. Participating is easy: just make observations in iNaturalist of wild plants, animals, and fungi, anywhere in the nine counties that touch San Francisco Bay, April 24 - April 27, and they'll automatically be added to this project.
Look in the project journal or visit the Cal Academy's City Nature Challenge page for a list of events happening throughout the Bay Area!