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.
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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!
Upcoming Events
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: Marin County Parks
McNears Beach Park
Saturday, May 3, 2025, 11am – 1pm
Saturday, May 3, 2025, 11am – 1pm
Source: One Tam Calendar
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: Marin County Parks
Mount Burdell Preserve
Monday, May 5, 2025, 10 – 11:30am
Monday, May 5, 2025, 10 – 11:30am
Source: One Tam Calendar
When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
LUNCHTIME TALK ON VEGETATION MANAGEMENT ON MT. TAM
Wednesday, May 7
12 p.m.-2 p.m.
Source: Marin County Parks
Loma Alta Preserve
Wednesday, May 7, 2025, 10am – 2pm
Wednesday, May 7, 2025, 10am – 2pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: Marin County Parks
McNears Beach Park
Saturday, May 10, 2025, 11am – 1pm
Saturday, May 10, 2025, 11am – 1pm
Source: One Tam Calendar
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: Marin County Parks
McNears Beach Park
Sunday, May 11, 2025, 11:30am – 1pm
Sunday, May 11, 2025, 11:30am – 1pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
When: Wednesdays, 10 am–2:30 pm; Registration Required
Source: Marin County Parks
Mount Burdell Preserve
Wednesday, May 14, 2025, 10am – 2pm
Wednesday, May 14, 2025, 10am – 2pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: Marin County Parks
McNears Beach Park
Saturday, May 17, 2025, 11am – 1pm
Saturday, May 17, 2025, 11am – 1pm
Source: Marin County Parks
Point Reyes National Seashore
Sunday, May 18, 2025, 10am – 2pm
Sunday, May 18, 2025, 10am – 2pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: Marin County Parks
Old St. Hilary's Preserve
Sunday, May 18, 2025, 9 – 11am
Sunday, May 18, 2025, 9 – 11am
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
When: Wednesdays, 10 am–2:30 pm; Registration Required
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: Marin County Parks
Ring Mountain Preserve
Saturday, May 24, 2025, 9 – 11am
Saturday, May 24, 2025, 9 – 11am
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: Marin County Parks
Ring Mountain Preserve
Wednesday, May 28, 2025, 10am – 3pm
Wednesday, May 28, 2025, 10am – 3pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: Marin County Parks
McInnis Park
Saturday, May 31, 2025, 11am – 12:30pm
Saturday, May 31, 2025, 11am – 12:30pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: Marin County Parks
Mount Burdell Preserve
Saturday, May 31, 2025, 8:15 – 10:15pm
Saturday, May 31, 2025, 8:15 – 10:15pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
When: 1st, 3rd, & 5th Tuesdays, 10 am–2 pm
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Source: One Tam Calendar
Join a Muir Woods Ranger in a grove of towering Coast Redwoods for a 15-minute talk.
Featured Work
One Tam partners are now working to identify monarch butterfly overwintering and breeding habitat for restoration in the region, and to plan enhancement efforts.
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.
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