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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 climate change. One Tam 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

 
Halloween Activities & Graveyard Stroll
Source: Marin County Parks
Lucas Valley Field Office
Sunday, October 25, 2026, 6:30 – 8:30pm
 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm;

 
Evening at Roy’s Redwoods
Source: Marin County Parks
Roy’s Redwoods Preserve
Wednesday, October 28, 2026, 3:30 – 6:30pm
 
Muir Woods Night Tour
Source: One Tam Calendar

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

 
Bolinas Lagoon Birds
Source: Marin County Parks
Bolinas Lagoon
Sunday, November 1, 2026, 10am – 2pm
 
Restoration at Hal Brown Park
Source: Marin County Parks
Hal Brown Park
Wednesday, November 4, 2026, 2 – 4pm
 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm;

 
Trail Stewardship
Marin Water
 
Landscape Stewardship at Paradise
Source: Marin County Parks
Paradise Beach Park
Sunday, November 8, 2026, 9am – 12pm
 
Deer Island Stroll
Source: Marin County Parks
Deer Island Preserve
Sunday, November 8, 2026, 9am – 12pm
 
Bolinas Park Stewardship
Source: Marin County Parks
Bolinas Park
Tuesday, November 10, 2026, 10am – 12pm
 
Devil’s Gulch
Source: Marin County Parks
Samuel P Taylor State Park
Tuesday, November 10, 2026, 10am – 2pm
 
2nd Friday Weeding
Source: Marin County Parks
Ring Mountain Preserve
Friday, November 13, 2026, 9:30am – 12pm
 
Marin Headlands Nursery
Source: One Tam Calendar

When: Saturday, November 14th, 10:00 am–1:00pm. 

 
Habitat Restoration Team
Source: One Tam Calendar

When: Sundays, 9:30 am–2:30 pm

 
Workday at the Bike Park
Source: Marin County Parks
Stafford Lake Park
Sunday, November 15, 2026, 9am – 12pm
 
Rush Creek Birds
Source: Marin County Parks
Rush Creek Preserve
Sunday, November 15, 2026, 10am – 2pm
 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 3rd & 5th Tuesdays, 10 am–2 pm

 
Civic Center Landscape Stewardship
Source: Marin County Parks
Veterans Memorial Auditorium
Tuesday, November 17, 2026, 10am – 12pm
 
Abbotts Lagoon Birds
Source: Marin County Parks
Point Reyes National Seashore
Wednesday, November 18, 2026, 10am – 2pm
 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm;

 
Nature Journaling Walk
Source: Marin County Parks
Ring Mountain Preserve
Saturday, November 21, 2026, 9 – 11:30am
 
Habitat Restoration Day
Marin Water
 
Gratitude Scavenger Hunt/Arts & Crafts
Source: Marin County Parks
Stafford Lake Park
Sunday, November 22, 2026, 10am – 12pm
 
Restoration at Hal Brown Park
Source: Marin County Parks
Hal Brown Park
Sunday, November 22, 2026, 9am – 12pm
 
Junior Rangers: Nature Journaling
Source: Marin County Parks
Roy's Redwoods Preserve
Sunday, November 22, 2026, 9 – 11:30am
 
Senior Stroll: Las Gallinas Birds
Source: Marin County Parks
Las Gallinas Treatment Ponds
Monday, November 23, 2026, 10am – 12pm
 
Indian Tree
Source: Marin County Parks
Indian Tree Preserve
Sunday, November 29, 2026, 9am – 2pm
 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm;

 
Trail Stewardship Day
Marin Water
 
Invasive Plant Patrol
Source: One Tam Calendar

When: Wednesdays, 10 am–2:30 pm;

 
Habitat Restoration Team
Source: One Tam Calendar

When: Sundays, 9:30 am–2:30 pm

 
Tennessee Valley Tuesday Stewards
Source: One Tam Calendar

When: 3rd & 5th Tuesdays, 10 am–2 pm

 
Marin Headlands Nursery
Source: One Tam Calendar

When: Saturday, December 19th, 10:00 am–1:00pm. 

 
Habitat Restoration Day
Marin Water
 
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