City Nature Challenge: Partner with Us

Partnering with The Nat

Partner with your fellow nature nerds (that's us). Join the global effort to get people to explore our incredible region. You will be in good company, all of San Diego County is participating!

Partnering can be as simple as sharing out about the City Nature Challenge with your network, or as involved as planning an event. Scroll down to see all the ways you can get involved. We’ve done most of the work for you!

Anyone Can Help

The 2023 City Nature Challenge begins Friday, April, 28 at 12 AM PT and ends Monday, May 1 at 11:59 PM PT. Any observation made within the county during the City Nature Challenge will count toward San Diego’s total. Here are a few ways anyone can help:

  • Spread the word.
    • Reach out to members, volunteers, staff, colleagues, and friends (PDF)
    • Print and post the flyer at your location (PDF)
    • Post on social media (you can easily share what we post on Facebook, Twitter, and Instagram)
    • Send an e-newsletter
    • Share a video about CNC in English or Spanish.
  • Make observations of your own during the four-day period.
  • Identify others' observations until May 7.
    • Help identify observations that are not yet at the species level
    • Visit the observations page on to begin

The Nat plans to make a formal announcement of the total number of observations made in San Diego County on Friday, May 8 via social media, so be sure to follow on those platforms to see the tallied results.

Host an event

  • Organize an event at your location during City Nature Challenge (April 28-May 1) encouraging your community to make iNaturalist observations
  • Hikes, restoration events, and festivals all provide great opportunities for making observations
  • Host a virtual iNaturalist training
  • Let us know about your event so we can post it on our event website

Not familiar with iNaturalist? We've got you covered.

Learn more


Community science is a wonderful opportunity to incorporate Next Generation Science Standards (NGSS) and Science, Technology, Engineering, and Math (STEM) into your classroom. And City Nature Challenge really exemplifies it! Plus, the Challenge is a wonderful excuse to get students outside. Learn how to get started with students and create iNaturalist projects using the following resources:



Email Community Science Manager, Lauren Marino Perez.