Home

Explore
Explore

Learn about our work 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. Tamalpais is a beloved local treasure. But the mountain also faces 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, Marin Water, 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

 
Marin Headlands Nursery
Source: One Tam Calendar

When: Saturday, August 22nd, 10:00 am–1:00pm. 

 
Visit the Tam Van at Roy's Redwoods Preserve
Source: One Tam Calendar

Join us for a series of special weekends as the Tam Van visits Roy’s Redwoods🌲!

 
Kites n' Kites
Source: Marin County Parks
Upton Beach
Saturday, August 22, 2026, 3 – 5pm
 
Beach Volleyball Bonanza
Source: Marin County Parks
Upton Beach
Sunday, August 23, 2026, 12 – 2pm
 
Visit the Tam Van at Roy's Redwoods Preserve
Source: One Tam Calendar

Join us for a series of special weekends as the Tam Van visits Roy’s Redwoods🌲!

 
Workday at the Bike Park
Source: Marin County Parks
Stafford Lake Park
Sunday, August 23, 2026, 9am – 12pm
 
Landscape Stewardship
Source: Marin County Parks
McInnis Park
Wednesday, August 26, 2026, 2 – 4pm
 
Tennessee Valley
Source: Marin County Parks
Marin Headlands
Wednesday, August 26, 2026, 10am – 2pm
 
Lunar Eclipse with Marin Stargazers
Source: Marin County Parks
Mount Burdell Preserve
Thursday, August 27, 2026, 8 – 9:30pm
 
Muir Woods Night Tour
Source: One Tam Calendar

Ever wondered what Muir Woods is like after the park closes?

 
Marin Headlands Nursery
Source: One Tam Calendar

When: Saturday, August 29th, 10:00 am–1:00pm. 

 
Movie Night at Point Reyes Park
Source: Marin County Parks
Point Reyes Park
Friday, August 28, 2026, 7:30 – 9:30pm
 
Mount Burdell Plant Galls
Source: Marin County Parks
Mount Burdell Preserve
Sunday, August 30, 2026, 9am – 12pm
 
Bothin Marsh Restoration
Source: Marin County Parks
Mill Valley/Sausalito Path
Sunday, August 30, 2026, 9am – 12pm
 
Juice with a Ranger
Source: Marin County Parks
King Mountain Summit
Saturday, September 5, 2026, 10am – 1pm
 
Meet Wildlife with WildCare
Source: Marin County Parks
Paradise Beach Park
Saturday, September 5, 2026, 11am – 12:30pm
 
Belonging in Nature: Queer and Trans in the Nurseries
Source: One Tam Calendar

When: Saturday, September 12th, 2026, 10am – 1:00pm

 
Hamilton Wetlands Birds
Source: Marin County Parks
Hamilton Wetlands
Sunday, September 13, 2026, 10am – 2pm
 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 3rd & 5th Tuesdays, 10 am–2 pm

 
Sunset Nature Walk
Source: Marin County Parks
Terra Linda Sleep Hollow Preserve
Saturday, September 19, 2026, 5:30 – 7:30pm
 
The Road to Becoming a Park Ranger
Source: Marin County Parks
Deer Island Preserve
Sunday, September 20, 2026, 10:30am – 12:30pm
 
Junior Rangers: Nighttime Creatures
Source: Marin County Parks
Roy's Redwoods Preserve
Sunday, September 20, 2026, 5 – 7pm
 
Muddy Hollow
Source: Marin County Parks
Point Reyes National Seashore
Wednesday, September 23, 2026, 10am – 3pm
 
National Public Lands Day in Muir Woods
Source: One Tam Calendar

When: Saturday, September 26th, 8:30am - Noon.

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 3rd & 5th Tuesdays, 10 am–2 pm

 
Senior Stroll: Loch Lomond Birds
Source: Marin County Parks
Loch Lomond Marina
Wednesday, September 30, 2026, 10am – 12pm
 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 3rd & 5th Tuesdays, 10 am–2 pm

 
Senior Stroll: Raptors
Source: Marin County Parks
Marin Headlands
Tuesday, October 20, 2026, 10 – 11:30am
 
Oaks
Source: Marin County Parks
Deer Island Preserve
Sunday, October 25, 2026, 10am – 2pm
 
Evening at Roy’s Redwoods
Source: Marin County Parks
Roy’s Redwoods Preserve
Wednesday, October 28, 2026, 3:30 – 6:30pm
 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 3rd & 5th Tuesdays, 10 am–2 pm

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 3rd & 5th Tuesdays, 10 am–2 pm

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 3rd & 5th Tuesdays, 10 am–2 pm

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
Because climate change is causing sea level rise, flooding is intensifying at Bothin Marsh. This project is creating a shared community vision for its future.
Monarch Habitat Enhancement
One Tam partners improving monarch butterfly overwintering and breeding habitat for restoration at key park sites.

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