City Nature Challenge: San Diego

April 24-27, 2020
Show the world San Diego wins at nature

This year, the City Nature Challenge is a worldwide collaboration to collectively celebrate the healing power of nature by documenting all the species we can find!

Taking part is easy. From April 24-27, take photos of nearby nature, both inside and right outside your doors. Upload your photos to or use your smartphone and the iNaturalist app. There's no need to know the species you are posting, the iNaturalist community will identify them for you--that's part of the fun.

Read on for more information on how you can get started with iNaturalist and how to partner with us.

How to contribute

Get outside and take pictures of wild plants and animals.

Upload your photos to or use the iNaturalist app. You can use a desktop computer or a smart phone. Not familiar with the app? Not to worry, it’s super user-friendly. All you have to do is:

  1. Download the free iNaturalist app to your Android or iPhone
  2. Take photos from April 24-27 of wild plants and animals in San Diego County (in a backyard, inside your home, etc.)
  3. Upload your photos to iNaturalist - use the app or a desktop computer
  4. Learn more as the iNaturalist community helps identify your observations. You can help identify observations of others as well.

Make your observations count! Learn how to get started with iNaturalist here: English pdf, Spanish pdf

In order for observations to count in the 2020 City Nature Challenge, photos must be taken between April 24 to April 27, 2020 and must be uploaded by 9 AM on Monday, May 4, 2020.


Participate on your own or as part of a City Nature Challenge event around the county. Check event schedule.

Partner with Us

Does your organization want to get involved and partner with us? We have a tool kit full of resources that make it easy to join us. Learn more.


The City Nature Challenge is a wonderful opportunity to get your students outside and incorporate Next Generation Science Standards (NGSS) and STEM into your classroom. Create student iNaturalist projects using the following resources: