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Explore

Learn about Mt. Tamalpais and get trail tips

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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

 
Watershed Stewardship and Naturalist Walk
Source: One Tam Calendar

When: Saturday, December 21

 
Salmon of San Geronimo Valley
Source: Marin County Parks
Leo Cronin Parking Lot
Sunday, December 22, 2024, 10am – 12pm
 
Stafford Lake Birds
Source: Marin County Parks
Stafford Lake Park
Sunday, December 22, 2024, 10am – 2pm
 
Invasive Plant Patrol
Source: One Tam Calendar

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

 
Sensory Storytime with a Ranger (English/Spanish)
Source: Marin County Parks
South Novato Library
Saturday, December 28, 2024, 3:30 – 4:30pm
 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

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

 
(CANCELED) 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

 
Learn to Pier Fish
Source: Marin County Parks
Paradise Beach Park
Saturday, January 4, 2025, 11am – 1:30pm
 
Senior Stroll: Corte Madera Creek
Source: Marin County Parks
Corte Madera Creek Pathway
Sunday, January 5, 2025, 10 – 11:30am
 
Habitat Restoration Team
Source: One Tam Calendar

When: Sundays, 9:30 am–2:30 pm

 
Buck Gulch Waterfall Walk
Source: Marin County Parks
Ignacio Valley Preserve
Sunday, January 5, 2025, 10 – 11am
 
San Geronimo Valley Salmon
Source: Marin County Parks
San Geronimo Park
Tuesday, January 7, 2025, 10am – 12pm
 
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

 
Rollin’ Into the New Year
Source: Marin County Parks
McInnis Park
Friday, January 10, 2025, 5 – 7pm
 
Sunrise Walk
Source: Marin County Parks
Deer Island Preserve
Saturday, January 11, 2025, 6 – 8am
 
Planting for Monarchs: Joske Grove
Source: One Tam Calendar

When: Saturday, January 11, 2025, 10 am–2 pm;

 
Family Walk: Blackstone Canyon
Source: Marin County Parks
Marinwood
Sunday, January 12, 2025, 10am – 1pm
 
Roy’s Redwoods Bioblitz
Source: Marin County Parks
Roy’s Redwoods
Sunday, January 12, 2025, 10:30am – 1pm
 
Habitat Restoration Team
Source: One Tam Calendar

When: Sundays, 9:30 am–2:30 pm

 
Roy’s Redwoods Mushroom Hike
Source: One Tam Calendar

Join us to discover the mushrooms of Roy’s Redwoods Preserve.

 
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

 
Watershed Stewardship and Naturalist Walk
One Tam Calendar

When: Saturday, January 18

 
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

 
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

 
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

 
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

 
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

 
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

 
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, 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

 
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

 
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

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.
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.

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