City Nature Challenge
When is the BioBlitz?Cabrillo National Monument’s BioBlitz will be hosted on Saturday, April 25, 2026, with expert-led guided walks from 8:30 am – 3:30 pm.
You can join all walks across the day, or just one then explore freely!
For fee-free entry to the park, you must RSVP at cabr_education@nps.gov
What is a BioBlitz?A BioBlitz is a concentrated effort to discover and document as many species of plants, animals, and other organisms as possible within a certain time using the iNaturalist app.
Free to download on iOS and Android devices, iNaturalist is a global platform where people share photos or audios of organisms through submissions called observations. They help map an area’s biodiversity (many different forms of life) and measure impacts and changes over time.
As a “snapshot” of biodiversity, BioBlitzes connects community members with the outdoors and citizen science in a fun, interactive, and engaging way. Join park staff, local scientists, and fellow nature enthusiasts for a BioBlitz at Cabrillo National Monument to learn and gather data on San Diego’s incredible biodiversity.
Join our iNaturalist project and add your observations at Cabrillo National Monument City Nature Challenge BioBlitz 2026.
Did you know?
This BioBlitz is part of the City Nature Challenge, a global effort to promote biodiversity awareness and citizen science. Cities across the nation will compete over the weekend for the highest number of species and observations.
We’ll do our best to catalogue our park’s many species through expert-led guided walks on:
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Plants and Pollinators
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Birds
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Intertidal Zone
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And more!
Whether you’re a researcher, a naturalist, or a lover of your national parks, this BioBlitz will have something for everyone, so join us in making San Diego number one!
For more info about the City Nature Challenge, please visit:
https://www.citynaturechallenge.org/
