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  • Support One Tam
    to care for Mt. Tam
    Join One Tam today
    for a healthy Mt. Tam tomorrow
    Join us
    Photo by Lieven Leroy
  • 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

 
All About Fascinating Foothill Yellow-legged Frogs
Source: One Tam Calendar

Join us on May 27, 4:00-5:00 pm for a One Tam member webinar all about the fascinating foothill yellow-legged frogs,

 
Webinar: Spring Birdsong
Source: Marin County Parks
Zoom Presentation
Thursday, May 27, 2021, 1:30 – 2pm
 
Evolving Shorelines Community Meeting: Concepts Evaluation Presentation
Source: One Tam Calendar

The One Tam team has completed an analysis of the Draft Adaptation Concepts for enhancing the Bothin Marsh Open Spac

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