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What's New
A couple hiking a dirt trail in the Marin Headlands. A Golden Gate Bridge tower can be seen peeking through the green mountain range in the background.
Hiking the Headlands
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Curious about the natural world of the Marin Headlands? This 2-mile guided hike will explore the ecosystems, animals, and geology of these rolling hills.

Register here
A sunny day over Crissy Field Marsh.
Belonging in Nature: August 2025
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We’re excited to kick off a special summer series of Belonging in Nature: Queer & Trans Community Day land stewardship programs (June-September) in collaboration with four amazing artists, chefs, and land stewards!

Registration Required
Shorebirds observed during perigean spring tide in January 2024
Beginning Bilingual Birding
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Come learn to bird in English and Spanish at our two hour guided hike at Crissy Field!

¡Ven a aprender sobre aves en inglés y español en nuestra excursión guiada de dos horas en Crissy Field!

Register Here
Scenic landscape view of Fort Cronkhite, Rodeo Beach, and the Marin Headlands.
Beach to Battery - A Ranger-Guided Hike
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Ever wondered what’s hidden inside some those historic WWII batteries tucked away in the hills of the Marin Headlands? Here’s your chance to find out! 

Register
A formerly incarcerated speaker lectures in the Alcatraz Dining Hall
Formerly Incarcerated Speaker Series

Upcoming Event Dates

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Series lifts up, highlights the voices of people who have spent time inside of jails and prisons.

Community outreach van
Follow the Tam Van!
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Join us for a series of special weekends as the Tam Van rolls across One Tam partner lands!

What's New
Sweeney Ridge
Sweeney Ridge Trail
Trail Length: 6.70 miles round trip
Visitors cross the bridge to Point Bonita Light
Point Bonita Trail
Difficulty Level: Easiest
Trail Length: 1.10 miles round trip
Ranger-led hike through Mori Point
Old Mori Trail
Difficulty Level: Easiest
Trail Length: 1.10 miles round trip
Tennessee Valley Trail is perfect for the whole family
Tennessee Valley Trail
Difficulty Level: Moderate
Trail Length: 3.40 miles round trip
NightHowl 2018
Give
NightHowl
Our Work
Photowalks
Bay Trail at Battery East
Our Work
Contact Membership
Illustration of the Campfire Circle at the Presidio Tunnel Tops with the Golden Gate Bridge in the background.
Our Work
Trails Forever Dinner 2022
Mt Tamalpais
Our Work
Member Hiking & Events Series
Park Heroes: Brian O'Neill, Ryan Jones, and Carola Ashford
Our Work
Tribute Funds
Our Work
Janet Cardiff, "The Forty Part Motet"
Alcatraz Historic Prisons
Our Work
Alcatraz at a Glance
Lands End
Our Work
Jeannene Przyblyski, Comings & Goings: 2 Backwards Journeys thru Lands End
Our Work
Jeannene Przyblyski, A Lover’s Line Thru the Presidio
Illustration of Alcatraz as seen through a keyhole, behind a chain link fence as a pelican flies by
Our Work
Art Escape at Alcatraz, by Prison Arts Touching Hearts
Our Work
Charles Unser, Alcatraz Portraits
Prisoners of Age exhibit
Our Work
Ron Levine, Prisoners of Age
Home Land Security Exhibit
Our Work
Home Land Security
Batteries to Bluffs Trail, Golden Gate Bridge
Batteries to Bluffs Trail
Difficulty Level: Strenuous
Trail Length: 0.70 miles round trip
Runner takes on the challenge of the Dipsea Trail
Dipsea Trail
Difficulty Level: Very Strenuous
Trail Length: 9.44 miles round trip

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