Adults

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Do you ever wish we could look back in time? We can, by studying the cosmic microwave background (CMB), which reveals the fiery early universe when it was only 0.003% of its present age. This talk will show how studying the CMB allows us to learn about the origin, composition, and ultimate fate of the universe.
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Enjoy a Saturday morning hike, guided by Friends of Mt. Tam volunteers.
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Join local hydrologist Peter Hartsough and MMWD staff Mike Swezy to learn more about how the hydrology of West Peak influences the watersheds it feeds, and how geology and climate in turn influence the mountain's hydrology.
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A total solar eclipse is one of nature‰ЫЄs most magnificent spectacles. On August 21, 2017, for the first time in 38 years, the very narrow path of a total solar eclipse falls across the continental US. Come learn about total solar eclipses and how to view this one!
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Enjoy a Saturday morning hike, guided by Friends of Mt. Tam volunteers.
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Join filmmaker Gary Yost and Marin Municipal Water District ranger Matt Cerkel on Mt. Tam for a special talk about the true peak of our beloved mountain.
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In this informative and entertaining account, Williams investigates cutting-edge research as she travels to frafrant cypress forests in Korea to meet the rangers who administer "forest healing programs", to the green hills of Scotland and its "ecotherapeutic" approach to caring for the mentally ill, to a river trip in Idaho with Iraqi vets suffering from PTSD, to the West Virginia mountains where she discovers how being outside helps children with ADHD.
Crissy Field activities
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Sports Basement
Join a Presidio Park Ranger and Presidio Trust guide on this gentle four-mile bike ride.
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Come learn how to become a community scientist and monitor the changes in the Mt. Tam herpetofauna community.
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A family-friendly bike trip around Crissy Field and the Presidio Main Post!