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  • Explore Mt. Tam
    Looking for a family-friendly, weekend outing?
    Learn more
    Photo: Monica Stafford / Parks Conservancy
  • Support One Tam
    to care for Mt. Tam
    Join One Tam today
    for a healthy Mt. Tam tomorrow
    Join us
    Photo by Lieven Leroy
  • 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, community 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

 
50th Anniversary: Birds at Mount Burdell
Source: Marin County Parks
Mount Burdell Preserve
Sunday, May 22, 2022, 9am – 12pm
 
Birds and Blossoms at Loma Alta
Source: Marin County Parks
Loma Alta Preserve
Wednesday, May 25, 2022, 10am – 2pm
 
Learn How to Pier Fish
Source: Marin County Parks
Paradise Beach Park
Saturday, May 28, 2022, 11am – 1pm
 
Ember Stomp
Source: Marin County Parks
Marin Civic Center, Fairgrounds Island, San Rafael
Saturday, May 28, 2022, 11am – 5pm
 
Rare Plants of the Tiburon Peninsula
Source: Marin County Parks
Ring Mountain Preserve
Tuesday, May 31, 2022, 10am – 3pm
 
The Backdoor To Muir Woods - Franklin Young
Source: Mt Tamalpais State Park
Mount Tamalpais State Park Docent Led Hike See Muir Woods without any parking hassle and without the crowds.
 
Juice with a Ranger
Source: Marin County Parks
Roy's Redwood Preserve
Friday, June 3, 2022, 8 – 10am
 
Friday Field Days - Marin
Source: One Tam Calendar

When: 1st and 3rd Fridays, 9:30am - 12:30pm; Registration Required

 
Walking Mt. Tam: Trails of Creativity - Caryn Lowe
Source: Mt Tamalpais State Park
Mount Tamalpais State Park Docent Led Hike "Me thinks that the moment my legs begin to move, my thoughts begin to flow!
 
Enjoy the panoramic vistas of West Peak and its history - Franklin Young
Source: Mt Tamalpais State Park
Mount Tamalpais State Park Docent Led Hike TENTATIVE ROUTE: Bootjack - Mountaintop - Arturo - Potrero Meadows - Benste
 
Senior Stroll: Old St. Hilary’s
Source: Marin County Parks
Old Saint Hilary's Preserve
Sunday, June 5, 2022, 10am – 12pm
 
Butterflies at Indian Valley
Source: Marin County Parks
Indian Valley Preserve
Tuesday, June 7, 2022, 10am – 2pm
 
Finding Balance in Nature - Maria De La Fuente
Source: Mt Tamalpais State Park
Mount Tamalpais State Park Docent Led Hike "Finding Balance in Nature by finding connections between us and the surroun
 
Learn about the "Crookest Railroad In The World" - Franklin Young
Source: Mt Tamalpais State Park
Mount Tamalpais State Park Docent Led Hike TENTATIVE ROUTE: Hogback - Matt Davis - Nora - West Point Inn - Old Railroa
 
Coffee with a Ranger
Source: Marin County Parks
Indian Valley - IVC Parking Lot
Saturday, June 11, 2022, 8 – 10am
 
Deer Island
Source: Marin County Parks
Deer Island Preserve
Sunday, June 12, 2022, 10am – 2pm
 
The (not-so) Hidden Treasures of Mt Tamalpais - Brian Muir
Source: Mt Tamalpais State Park
Mount Tamalpais State Park Docent Led Hike "The (not-so) Hidden Treasures of Mt Tamalpais: Experience multiple geologic
 
Botany at Bull Point
Source: Marin County Parks
Point Reyes National Seashore
Wednesday, June 15, 2022, 10am – 2pm
 
Kayaking Whitehouse Pool
Source: Marin County Parks
Whitehouse Pool, 12349 Sir Francis Drake Blvd, Inverness, CA
Saturday, June 25, 2022, 10am – 1pm
 
Friday Field Days - Marin
Source: One Tam Calendar

When: 1st and 3rd Fridays, 9:30am - 12:30pm; Registration Required

 
Friday Field Days - Marin
Source: One Tam Calendar

When: 1st and 3rd Fridays, 9:30am - 12:30pm; Registration Required

 
Friday Field Days - Marin
Source: One Tam Calendar

When: 1st and 3rd Fridays, 9:30am - 12:30pm; Registration Required

All Events

Featured Work

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.
Wildlife Picture Index
The One Tam partner agencies are using motion-activated cameras to study wildlife on public lands around Mt. Tam.

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