The Bay Nature events calendar features events sponsored by Bay Area nature organizations from Sonoma to Santa Cruz. Find guided hikes, learn about Bay Area wildlife, enjoy nature festivals, and more! For Bay Nature-sponsored events click here.

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Ongoing Events

City Nature Challenge April 27 to April 29

Can the Bay Area win twice in a row? This year the competition is even higher with over 150 cities participating globally! We need everyone's help documenting nature in all nine Bay Area counties to show the world how engaged our residents are and how biodiverse the Bay Area is! Check the iNat website for a list of bioblitz events around the Bay. More Information You don't need to attend a b...

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