City Nature Challenge

The well at El Polin Spring
Events
El Polin Spring
Explore El Polin Spring in the Presidio with us for a naturalist adventure and celebration of biodiversity! A bioblitz is a quick, intense survey of the species present. Hone your observation skills, become a field biologist for the day, and enjoy some nature in the city and friends!
A volunteer with dark pants kneels at the left of the screen to take a picture with a phone of light pink flowers against a rocky background.
Events
Online/Virtual
Get ready for City Nature Challenge by joining this introductory webinar, including how to use the iNaturalist app and website for basic and more advanced tasks.
A volunteer with dark pants kneels at the left of the screen to take a picture with a phone of light pink flowers against a rocky background.
Events
Join us at Ring Mountain Open Space Preserve for a naturalist adventure and celebration of biodiversity!
Discovering local flora at Rancho.
Events
Le Conte Trailhead
Come out for an afternoon of discovery and exploration of the natural world at Rancho Corral de Tierra!