April 24 – April 27
Join the iNaturalist Project here!
Mark your calendars! From April 24–27, 2026, San Antonio will join cities around the globe in a wild celebration of biodiversity, curiosity, and community science.
City Nature Challenge is a fun, competitive way to see which city can make the most observations of local flora and fauna during the City Nature Challenge, April 24-27, 2026.
The City Nature Challenge began in 2016 as a friendly rivalry between San Francisco and Los Angeles. That first year, LA took the win with 10,352 observations, 1,601 species, and 574 participants. Since then, the challenge has blossomed into a global movement — with cities from every continent documenting the wild life that lives alongside us.
🌼 Why It Matters
Every observation helps scientists understand and protect our ecosystems. It’s also a chance to slow down, reconnect, and remember that we are part of nature — not separate from it.
Let’s show the world what San Antonio’s wild heart looks like. Let’s walk gently, notice deeply, and upload with joy.
Join the iNaturalist Project here!
