Date: Friday, April 24 – Monday, April 27, 2026
Time: On your own
Location: Preserve-wide
Started in 2016 as a competition between Los Angeles and San Francisco, the 4-day City Nature Challenge (CNC) has grown into an international event, motivating people around the world to find and document wildlife in their own cities. Run by the California Academy of Sciences and the Natural History Museum of Los Angeles County (NHM), the CNC is an annual four-day global bioblitz at the end of April, where cities collaborate to see what can be accomplished when we all work toward a common goal.
The winning cities with the most observations will be announced in May. Last year, there were more than 73,700 species observed and nearly 103,000 people uploaded their observations to iNaturalist.
For information on this 4-day event: https://www.citynaturechallenge.org/
Also see a special event on Sunday, April 26, 2026
