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Children watching an astronomer adjust a telescope on the Presidio Main Lawn for stargazing

San Francisco Amateur Astronomers' Star Party

Fri, Feb 7, 2025, 9:30pm - Sat, Feb 8, 2025, 12:30am Fri, Mar 7, 2025, 9:30pm - Sat, Mar 8, 2025, 12:30am

Come join the San Francisco Amateur Astronomers for free public stargazing of the Moon, planets, globular clusters and more!

(CANCELED) Muir Beach Clean-up

Thu, Dec 12, 2024, 9:30am - 12:30pm Thu, Jan 9, 2025, 9:30am - 12:30pm Thu, Sep 11, 2025, 9:30am - 12:30pm Thu, Dec 11, 2025, 9:30am - 12:30pm Thu, Jan 8, 2026, 9:30am - 12:30pm

Muir Beach parking lot

Come join the fun and help conserve and protect our beautiful public beaches!

Orange, black and white monarch butterfly seen landing on purple milkweed flowers.

(CANCELED) Planting for Monarchs: Joske Grove

Sat, Dec 14, 2024, 11:00am - 3:00pm

Join us in a community planting day to enhance monarch habitat in Marin County!

Planting for Monarchs: Joske Grove

Sat, Jan 11, 2025, 11:00am - 3:00pm

Join us in a community planting day to enhance monarch habitat in Marin County!

Registration Required

Invasive Plant Patrol

Wed, Nov 13, 2024, 11:00am - 3:30pm

Bicentennial Camp

Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Registration Required

The White-Tailed Kite is quite a sight

The White-Tailed Kite is a beautiful predatory raptor that has recently been spotted at various parklands in San Mateo. Read more about the role this bird plays in its ecosystem and why I think it is so special.