Home

Explore
Explore

Learn about Mt. Tamalpais 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 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

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Carson Falls
Source: Marin County Parks
Marin Water District
Wednesday, February 19, 2025, 10am – 2pm
 
Coffee with a Ranger at Roy’s Redwoods
Source: Marin County Parks
Roy’s Redwoods Preserve
Saturday, February 22, 2025, 8:30 – 10:30am
 
Nature Journaling
Marin Water and California State Parks

 
Habitat Restoration Team
Source: One Tam Calendar

When: Sundays, 9:30 am–2:30 pm

 
Coffee with a Ranger at Deer Island
Source: Marin County Parks
Deer Island
Sunday, February 23, 2025, 8 – 10am
 
Hamilton Wetlands Birds
Source: Marin County Parks
Hamilton Wetlands
Monday, February 24, 2025, 10am – 2pm
 
Old Railroad Grade
Source: Marin County Parks
Loma Alta Preserve
Wednesday, February 26, 2025, 10am – 2pm
 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Family Walk: Indian Valley
Source: Marin County Parks
Indian Valley Preserve
Sunday, March 2, 2025, 10am – 1pm
 
Habitat Restoration Team
Source: One Tam Calendar

When: Sundays, 9:30 am–2:30 pm

 
Stargazing at Stafford Lake
Source: Marin County Parks
Stafford Lake Park
Sunday, March 2, 2025, 6 – 8pm
 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Frog Docent Program Training
One Tam Calendar

 
Turtle Observer Training
Marin Water

 
Habitat Restoration Team
Source: One Tam Calendar

When: Sundays, 9:30 am–2:30 pm

 
Senior Stroll: Coastal Trail
Source: Marin County Parks
Marin Headlands
Tuesday, March 11, 2025, 10am – 2pm
 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Bald Hill Broom Bust
with Marin Water and Marin County Parks

Please join Marin Water and Marin County Parks for our annual Bald Hill Broom Bust!

 
Bald Hill Guided Naturalist Walk
Marin Water and Marin County Parks

Want to get great views of the watershed, learn about the history of unique natural areas, and discover the connectio

 
Indian Valley
Source: Marin County Parks
Indian Valley Preserve
Sunday, March 16, 2025, 10am – 2pm
 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Watershed Stewardship and Naturalist Walk
One Tam Calendar

When: Saturday, January 18

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Watershed Stewardship and Naturalist Walk
One Tam Calendar

When: Saturday, March 15

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm; Registration Required

All Events

Featured Work

Monarch Habitat Enhancement
One Tam partners are now working to identify monarch butterfly overwintering and breeding habitat for restoration in the region, and to plan enhancement efforts.
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.
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.

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