City Nature Challenge
04/24/2026 - 04/27/2026
Admission
- Free
Location
Summary
Join The Nat, the SDSU Biodiversity Museum, and the UC San Diego Natural Reserve System in a worldwide collaboration to observe the natural world through photography!
Description
This is a partner-hosted event. See full details on the City Nature Challenge website
Join us April 24-27, 2026
The 2026 City Nature Challenge is a 4-day, worldwide collaboration to get people observing the natural world through photography—and The Nat, the SDSU Biodiversity Museum, and the UC San Diego Natural Reserve System are coordinating San Diego’s annual participation! We're using the free iNaturalist app and iNaturalist.org website to tally results for observations made in San Diego County. All wild plants and animals count, even non-native species. The City Nature Challenge will take place April 24–27, 2026.
How to participate in City Nature Challenge
It’s easy! You can go out on your own, join our partners at one of the many special events hosted remotely and around town, or find an event near you. All you have to do is:
- Download the free iNaturalist app to your Android or iPhone
- Join the City Nature Challenge 2026: San Diego County iNaturalist project
- Take photos of wild plants and animals in San Diego County from April 24–27
- Upload your photos to iNaturalist by May 10
- Learn more as the iNaturalist community helps identify your observations
- Check out the City Nature Challenge Portal here for more information from our partners at the SDSU Biodiversity Museum.
- Check the City Nature Challenge Results Page on May 13 for the final standings!