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One Tam: many ways to give back to the mountain that gives us so much

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. Thanks to the diligent efforts of conscientious community members, Roy’s Redwoods was protected from development, and later purchased by the Marin County Open Space District in 1978, becoming the first public preserve in the valley. 

Today, the redwood understory vegetation is largely trampled and denuded by a spider web of informal trails. Additionally, informal trail use is contributing to soil compaction and erosion along creek channels, and is compromising the natural hydrologic processes of the alluvial flood plain and ultimately the resiliency of the redwood forest. 

Many would like to see Roy’s Redwoods restored, thereby protecting the many special status species that call this grove home, including the Northern Spotted Owl, listed as threatened under the Endangered Species Act. To better understand what makes Roy’s Redwoods special to the community, and the environmental challenges facing the preserve, One Tam partners - including Marin County Parks and The Golden Gate National Parks Conservancy - have completed a comprehensive analysis of the site to establish restoration goals for the preserve, which included:

  • Talking with San Geronimo Valley community members
  • Gathering expert knowledge of the site’s history and ecosystem
  • Conducting a hydrologic assessment
  • Conducting vegetation and wildlife assessments
  • Completing a thorough review of existing literature and data on the site 
  • Hosting community science events to document the biodiversity of the preserve

With the site analysis phase of the project complete, the conceptual design phase has begun. As we embark on conceptual design, our goal is to enhance the health of the ecosystem while improving visitor experience. Specifically, we will explore opportunities to restore hydrologic function of the alluvial valley, improve redwood forest and wetland habitats, guide visitors through an immersive and accessible experience of the redwoods, and generally improve visitor experience and circulation. 

Initial funding for this project was provided through Measure A.