Skip to main content

One Tam Circle

One Tam Circle

Your Gift Makes a Difference

The One Tam Circle are our group of supporters who make an annual leadership gift of $1,000 or more. Mt. Tam was saved and preserved by pioneering conservationists and philanthropists, and as a member of the One Tam Circle, you inherit that visionary legacy. You will inspire, protect, nurture, and sustain the long-term health and vitality of the mountain—and the communities entrusted with its care.

One Tam Circle members have exclusive access to special Circle events, member events, and more.

Join today, or contact Sarah Lincoln to learn more at

Your One Tam Circle membership will...


  • Contribute to a new environmental internship opportunity on Mt. Tam for a high school student or recent college graduate and launch a young person’s career
  • Support Trout in the Classroom, serving over 1,500 elementary-age children in Marin
  • Support Mt. Tam’s Early Detection Rapid Response weed management Program
  • Provide tools and staff support for community volunteers restoring native habitat and improving Mt. Tam’s trail corridors
  • Fund educational materials for the One Tam Roving Ranger, inspiring stewardship efforts on the mountain
  • Support a two-day public science symposia to share actionable research with land managers, and provide a forum for sharing knowledge, experience, and information with each other, and with the next generation of Tam's stewards
  • Sponsor community science efforts like the Wildlife Picture Index Project and other events where teams of scientists, families and community members work together to discover plant and animal species on the mountain

One Tam Circle Member Benefits

  • Invitations to special One Tam hikes, receptions, performances, and exhibitions

  • Opportunities to meet Mt. Tam leaders, scientists, and experts

  • Recognition in the One Tam and Parks Conservancy annual reports
  • Subscription to One Tam’s quarterly e-newsletter

  • Satisfaction of securing the brightest future for Mt. Tam, and the youth and community members who sustain it