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  • City Nature Challenge 2021
    is almost here!
    The fun and the science
    start 4/29 at One Tam
    Join Us!
    Photo: One Tam
  • Casual in Nature:

    Wildlife Picture Index Photo Exhibit

    Visit the virtual exhibit
    Photo: One Tam
  • Protect Mt. Tam's Rare Foothill Yellow-legged
    Frogs at Little Carson Falls
    Learn more about these special frogs
    Photo: Kevin Wiseman / GANDA
  • On the Lookout for Invasive Species
    Early Detection Team releases
    report on findings and response
    Learn about our work
    Photo: Allison Titus/ Parks Conservancy
  • Interactive Marin Park Access Map
    Park status information from
    our five partner agencies
    Open The Map
    Photo: Lee Jester
Explore
Explore

Learn about Mt. Tam and get trail tips

Support
Support

Join One Tam to support our work and your mountain

Volunteer
Volunteer

Get involved in habitat restoration, commuity science, and more!

Events
Events

See all One Tam partner events

One Mountain, One Team

With its sweeping views, miles of trails, and ancient forests, Mt. Tam is a beloved local treasure. But the mountain also faces many challenges such as invasive weeds, forest diseases,
and the effects of climate change. 

The One Tam partnership mobilizes the resources of the National Park Service, California State Parks, The Marin Municipal Water District, Marin County Parks and Golden Gate National Parks Conservancy to ensure a vibrant future for Mt. Tamalpais. 

Join Us!

California State Parks
Marin County Parks
Golden Gate National Parks Conservancy
Marin Municipal Water District
National Park Service

Upcoming Events

 
Eggs, Tadpoles, to Frogs: Monitoring Frogs in the Golden Gate National Parks
Source: One Tam Calendar

Learn about the common and uncommon frogs you will see in the Golden Gate National Parks. Hear the story about the C

 
City Nature Challenge Launch with One Tam
Source: One Tam Calendar

If you are curious about the world around you and want to connect with others, consider joining the fun on iNaturalis

All Events

Featured Work

Wildlife Picture Index
The One Tam partner agencies are using motion-activated cameras to study wildlife on public lands around Mt. Tam.
Path beside the base of an enormous redwood tree
Roy’s Redwoods
Long loved by the San Geronimo Valley community, Roy’s Redwoods Open Space Preserve offers visitors an immersive experience in an old-growth redwood grove.
Bothin Marsh
With climate change and sea level rise, flooding is increasing in frequency and duration throughout Bothin Marsh - this project is creating a shared community vision for its future.

All Programs & Projects

What People Say

I walk out of this program with more perspective and a powerful mindset, to get out there and make a change. The One Tam LINC high school program made me realize that this is exactly what I want to do with my life: be outdoors and explore, while at the same time giving back to my community.
Nhi Nguyen
LINC 2018 Student
The mountain gives to all of us selflessly and constantly. The challenge is for each of us to consider in what way we can repay the generosity. Invent something, donate, pull weeds, shore up trails, volunteer with One Tam and you will become a Tamalpaian.
Peter Coyote
Co-author and Narrator, The Invisible Peak