Land Preservation

Since 1962, ACR has successfully protected some of the most diverse habitats in Marin and Sonoma Counties and continues to manage more than 5,000 acres of land today. ACR is proud to own and manage these 5,000 acres as habitat for native species and centers for nature education. View the ACR Preserves map. 

With each conservation victory comes a deep responsibility to protect and steward these incredible resources for both natural and human communities forever.


The Stewardship program provides the foundation to advance our conservation mission, and uses science-based best practices in the management and restoration of our sanctuaries. We control invasive plants and animals, monitor habitat conditions, track rare and sensitive species, and implement restoration projects using both our trained staff and our cadre of stewardship volunteers.

By re-establishing and protecting the natural nutrient and energy pathways, and supporting the integrity of surrounding landscapes, ecosystems on and off ACR lands will be more resilient to environmental change. Because these activities often have broad relevance, we engage in partnerships with other land managers, restoration colleagues, and conservation organizations to promote regional habitat protection.

ACR's Stewardship program incorporates strategic elements that directly support our conservation activities.

Ecological Monitoring and Assessment – Generating the data required to evaluate and respond to ecosystem changes. ACR's current work includes:

  • Assessing historic occurrence and potential reintroduction habitat of Foothill Yellow Legged Frogs.
  • Monitoring and assessing areas affected by sudden oak death
  • Performing baywide monitoring of tidal marshes to detect and remove invasive plants
  • Participating in the Sonoma County Wildlife Photo Index project to better understand how animals are using ACR lands and to inform regional conservation efforts
  • Monitoring endangered plant species for healthy vernal pool systems

Habitat Restoration – Restoring disturbed or degraded habitat and improving conditions for a healthy, functioning ecosystem. ACR's projects and priorities include:

  • Floodplain restoration on Bolinas Lagoon
  • Oak woodland restoration in Sonoma County, in which staff and volunteers have planted and tended hundreds of native oak trees and more than 10,000 native understory plants
  • Maintaining a restored area of coastal dunes at Toms Point, in northern Tomales Bay
  • Controlling invasive plants, collecting native seeds, and resource management in the Mayacamas Mountains

Conservation Planning – Collaborations that promote and identify efforts to protect native species, natural resources and habitat for the benefit of human and wildlife communities. ACR is working, collaborating and participating in:

  • The Marin County Board of Supervisors' Bolinas Lagoon Advisory Council
  • Sonoma County Wildlife Photo Index
  • Greater Farallones National Marine Sanctuary

For information on how to get involved with ACR's Stewardship Programs, please visit the Volunteer page.