• Getting a close-up look at an insect during a bioblitz
    Getting a close-up look at an insect during a bioblitz
  • Bioblitzing Lake Merritt in Oakland
    Exploring Lake Merritt in Oakland
  • Documenting organisms on the docks of San Francisco Bay
    Documenting organisms on the docks of San Francisco Bay
  • Looking for birds at a bioblitz in San Francisco
    Looking for birds at a bioblitz in San Francisco
  • Documenting a newt during a bioblitz
    Documenting a newt during a bioblitz

Bioblitzes are gatherings of scientists, citizen scientists, land managers, and more, all working together to find and identify as many different species as possible. Bioblitzes not only help land managers build a species list and atlas for their park and provide invaluable data for researchers, they also highlight the incredible biodiversity in these Bay Area oases.

Our bioblitzes are open to anyone and are family-friendly. Just bring your smartphone with the iNaturalist app, your curiosity, and your powers of observation to help catalog the natural wonders of our parks and open spaces.

We've been hosting grassroots bioblitzes in our community for over 5 years. Explore the events we've helped host in the past here!

Check below to find out about upcoming grassroots bioblitzes. Links will be live once the bioblitz is open for registration. Registration is free, but be sure to let us know you're coming so we can send you all the information you need prior to the bioblitz!



Saturday, October 6th: Bay Day Bioblitz

bay day logo

Save the Bay is sponsoring Bay Day on October 6th, and we hope you'll join us in celebrating by making and sharing your iNaturalist observations of San Francisco Bay wildlife. 

All observations made within approximately a half mile of the Bay Shoreline on October 6th will automatically be added to this project. Follow along and see what we are finding together. 

For more information on Bay Day, click here



Thursday, November 8th: Pillar Point Reef Bioblitz


Join us in bioblitzing Pillar Point Reef to kick off our tidepool monitoring season! We'll meet at the Pillar Point parking lot at 3pm and head out to the reef together to see what we can find. 

Bring your phone with iNaturalist downloaded or a camera so you can upload photos to iNaturalist later. Don't forget to wear rubber boots or shoes that can get wet and a few warm layers!




Saturday, December 8th: Ocean Beach Bioblitz

ocean beach

Come out with Cal Academy and our partners from the Golden Gate Audubon Society to discover what lives on San Francisco's largest beach.

Check back here soon for more information and registration!


Partner Organizations

We are lucky enough to partner with organizations who also host their own citizen science events. Check out their pages for some great upcoming bioblitzes, restoration days and more!

One Tam

California Center for Natural History


Join iNaturalist

Join iNaturalist

Our bioblitzes are powered by iNaturalist, our in-house, citizen science platform. It's a community-powered website and app that makes it easy to upload and share your observations in the field and to get help from other users with flora and fauna IDs.