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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

 
Roy’s Redwoods
Source: Marin County Parks
Roy's Redwoods Preserve
Tuesday, January 14, 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

 
Habitat Restoration Team at Fort Baker
Source: One Tam Calendar

When: Friday, January 17th from 9:00 am–12:00 pm

 
Watershed Stewardship and Naturalist Walk
One Tam Calendar

When: Saturday, January 18

 
One Tam Guided Nature Walk with Marin Water
Source: One Tam Calendar

When: Saturday, January 18, 2025 from 12:30pm–2pm.

 
One Tam Restoration Day with Marin Water
Source: One Tam Calendar

When: Saturday, January 18, 2025 from 9am–Noon.

 
Tennessee Valley Stewards
Source: One Tam Calendar

When: Saturday, January 18, 2025 from 10am–1pm 

 
Ranger-led Dog Walk Day
Source: Marin County Parks
Ring Mountain Preserve
Sunday, January 19, 2025, 3:30 – 5:30pm
 
Muir Woods Maintenance Day
Source: One Tam Calendar

When:

 
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

 
Coffee with a Ranger at Terra Linda/Sleepy Hollow
Source: Marin County Parks
Terra Linda/Sleepy Hollow Preserve
Sunday, January 26, 2025, 9 – 11am
 
Abbotts Lagoon Birds
Source: Marin County Parks
Point Reyes National Seashore
Sunday, January 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

 
Senior Stroll: Bothin Marsh
Source: Marin County Parks
Bothin Marsh
Sunday, February 2, 2025, 10 – 11:30am
 
Stargazing at Stafford Lake
Source: Marin County Parks
Stafford Lake Park
Sunday, February 2, 2025, 5:30 – 7:30pm
 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

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

 
Las Gallinas Birds
Source: Marin County Parks
Las Gallinas Sanitary District
Wednesday, February 5, 2025, 10am – 1pm
 
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

 
Kids Tide Pooling at Agate Beach
Source: Marin County Parks
Agate Beach
Saturday, February 8, 2025, 3 – 4pm
 
Family Walk: Roy’s Redwoods
Source: Marin County Parks
Roy's Redwoods Preserve
Sunday, February 9, 2025, 10am – 1pm
 
Art in the Park
Source: Marin County Parks
McInnis Park
Sunday, February 9, 2025, 11am – 1pm
 
Valentine’s Day Arts and Crafts
Source: Marin County Parks
Paradise Beach Park
Sunday, February 9, 2025, 11am – 1pm
 
Estero Trail
Source: Marin County Parks
Point Reyes National Seashore
Tuesday, February 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

 
Winter Wonderland Glowing Lantern
Source: Marin County Parks
McNears Beach Park
Saturday, February 15, 2025, 12:30 – 2:30pm
 
Watershed Stewardship and Naturalist Walk
One Tam Calendar

When: Saturday, February 15th

 
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

 
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