Audubon Canyon Ranch is a 501(c)(3) not-for-profit environmental conservation and education organization. It was founded in 1962 to safeguard Bolinas Lagoon from irresponsible development, leading the way for the protection of Tomales Bay.

Today, Audubon Canyon Ranch acts as guardian of a system of nature preserves spanning 26 properties in Marin, Sonoma and Lake counties. These 5,000 acres provide significant habitat to wildlife and have been placed in our care by generous donors to steward and protect in perpetuity. ACR works to improve global environmental health by conserving and stewarding valuable natural resources, managing for ecological resiliency, providing scientific solutions to ecosystem management, and teaching generations of conservationists in ways that strengthen natural and human communities.

Our Mission

Connecting nature, people and science in a rapidly changing world

Our Vision

Inspired and informed communities use scientific knowledge to build a resilient, sustainable society that respects the intrinsic value of our natural world.

ACR's Main Preserves

Bouverie Preserve, Glen Ellen, CA

Cypress Grove Preserve, Marshall, CA

Martin Griffin Preserve, Stinson Beach, CA

Modini Preserve, Healdsburg, CA
Preserve addresses and contact info >


ACR Headquarters are located at the Martin Griffin Preserve near the town of Stinson Beach in Marin County, CA.

A Community Organization

ACR's programs are made possible thanks to the contribution of thousands of hours of volunteer service, and donations from caring individuals, foundations and businesses.

ACR is an independent nonprofit organization with 501(c)(3) status. Our tax ID number is 94-6069140.

Photo Credits: 

  • Bob Hart