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from One Tam



Dear Friend,

We’re ready to welcome a new year here at One Tam. We suspect you are too!

For many of us, Mt. Tamalpais has been a place of refuge and solace during a very challenging year. It has also been a site for collaboration and innovation, as the One Tam partners have come together to support each other and advance our projects and programs during even the most unpredictable times.

That’s why I’m excited to share highlights from our work in the One Tam 2019-2020 Report to the Community. Read more below.

And if you’ve been out on our public lands recently, you’ll notice that mushroom season has returned! Our Community Science team is offering a "Wonders of Winter" virtual series to celebrate. Details below, as well as news about other One Tam events and volunteer opportunities this winter.

As always, thanks to all of our One Tam members and supporters who invest in our work and the mountain. We’re so grateful to have you with us as we begin 2021!

Cailey Gibson

Associate Director, Individual Giving, One Tam


Adapting through Partnership

 Mt Tam from North with Rainbow
Photo credit: Golden Gate National Parks Conservancy


Like so many, our work at One Tam was deeply affected the pandemic, wildfires, social unrest, and other challenges in 2020. With the creativity that has been a hallmark of this partnership from the beginning, we adapted our work to meet the moment, and we’re pleased to present our 2019-2020 Report to the Community.

A huge thank you to our wonderful community of donors and One Tam members who have helped make this work possible! Together with your support, we have 

  • Hosted the virtual One Tam Summit on climate change in October with over 400 participants and 18 hours of presentations from staff, regional experts, and youth on a range of climate-related topics  
  • Created healthy, more resilient forests by mapping and managing vegetation and reducing fire risk on Marin public lands 
  • Conducted rare plant surveys and removed invasive plants before they could take root as part of One Tam's innovative Early Detection and Rapid Response program
  • Adapted our popular LINC summer youth program online this summer, serving 22 youth, and launched the new year-long Rising Environmental Youth Leaders program in fall 2020   

...and more! Read the full 2019-2020 Report to the Community here.


Wonders of Winter

Waxcaps by dgreenberger via iNaturalist

Photo credit: David Greenberger / One Tam

It’s that time of year again when fascinating fungi and other wonders of winter emerge on Mt. Tam! One Tam partners are excited to bring you a special series of virtual opportunities to pique your curiosity. Plus, you’ll learn how you can contribute to community science efforts by observing what’s around you the next time you’re out for some fresh air. We hope you’ll join us this winter – check out the series below: 

  • January 18, 10:00-11:15 am: Martin Luther King, Jr. Day of Service Virtual Bioblitz Launch. The series kick-off is a special edition of the Golden Gate National Recreation Area’s MLK Jr. Day of Service to discover how you can become a community scientist and contribute to parks and beyond! This program will provide an introduction to iNaturalist, plus information about the amazing animals, plants, and fungi that you can observe in the parks and near your home this time of year. REGISTER >>
  • TBD, February. Keep an eye on our calendar for a virtual opportunity to mingle with mushrooms, to be announced for February. 
  • March 5, 7:00-8:30 pm: “Data Is Not the Destination”: talk and conversation with Christian Schwarz. Discover the meaning and possibility of community science through the world of mushrooms and their enthusiasts. Christian Schwarz is a naturalist based in Santa Cruz who photographs, teaches about, collects, and researches macrofungi. He is coauthor of Mushrooms of the Redwood Coast. REGISTER >> 

Member & Volunteer Opportunities


Mark your calendars for these upcoming events this winter! 

One Tam Member Webinar: February 11, 4-5pm 

  • Birds & Bees of One Tam with speakers Renee Cormier, Avian Ecologist at Point Blue, and Gretchen Lebuhn, Professor at San Francisco State University. Registration coming soon - check our calendar!

MMWD Volunteer Docent Trainings 

  • Turtle Docent Training - tentatively scheduled for Saturday, February 27 
  • Frog Docent Training - tentatively scheduled for Saturday, March 13
Please contact Suzanne Whelan, MMWD Watershed Volunteer Coordinator, at to learn more and to sign up.

iNaturalist Observation of the Month

 Ensatina by sanchezman via iNaturalist

Yellow eyed ensatinas are denizens of the redwood forest that emerge during this most wonderful time of the year. The West Coast boasts a diversity of Ensatina subspecies in what is known as a ring-species complex and our region has its own unique variety. Their resemblance to toxic California newts likely evolved as a defense against predators. Ensatinas are delicate; they breathe through their skin and their hatchlings look like tiny gummy bears. This observation was contributed by a participant of the Rising Environmental Youth Leaders program after a virtual lesson on salamander and mushroom observation technique - click below to view.

  Learn More  

About Us

California poppy along Mt. Tam's Ridgecrest Blvd



One Tam works to ensure a healthy, vibrant and diverse landscape for our beloved and iconic Mt. Tam. We are the community-supported partnership of Mt. Tam’s land agencies and managers.

One Team leads programs that care for our mountain, inspire our next generation of land stewards and strengthen our local community. We invite you to join us!




Going Further, Together

One Tam brings together inspired community members with its five partners to support the long-term stewardship of Mt. Tam.
One Tam Partner Logos: National Park Service, CA State Parks, Golden Gate National Parks Conservancy, Marin Municipal Water District, and Marin County Parks

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