Audubon Canyon Ranch (Stinson Beach, CA)


  • Name:Scott Artis
  • Title:Director of Development & Communication

Organization Address

  • Organization Name:Audubon Canyon Ranch
  • Address:4900 Shoreline Highway One
    Stinson Beach, CA 94970
    United States

Organization Phone

  • Main phone:415-868-9244

Organization Web

User Email


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  • Mission:
  • Audubon Canyon Ranch protects nature through land preservation, nature education, and conservation.

  • Overview:
  • Since its founding in 1962, Audubon Canyon Ranch (ACR) has provided award-winning education programming, preserved thousands of acres of threatened or vulnerable ecosystems, conducted and published groundbreaking conservation science research, and united countless and diverse communities with nature. With a mission to protect nature through land preservation, nature education, and conservation, ACR has cultivated generations of nature stewards. The organization’s innovative and comprehensive programs serve thousands of visitors and scientists throughout the Bay Area, across the nation, and around the world. ACR operates four primary sites; their total annual visitation is approximately 12,000:

    MARTIN GRIFFIN PRESERVE, near Stinson Beach in Marin County, whose 1,000 acres include one of the largest heron- and egret-nesting groves of redwood trees on the West Coast.

    BOUVERIE PRESERVE in Sonoma County’s Valley of the Moon, near Glen Ellen, with more than 500 acres of unspoiled wildlands.

    CYPRESS GROVE, a facility on Tomales Bay that serves as ACR’s Research Center.

    MODINI MAYACAMAS PRESERVES, two adjacent tracts near Healdsburg, protect more than 3,000 acres of diverse habitats in Sonoma County’s Mayacamas Mountains and provides visitors with opportunities to learn and explore.

    ACR achieves its mission through two priority program areas:

    CONSERVATION SCIENCE AND NATURAL RESOURCE MANAGEMENT. ACR conducts scientific studies and develops land-management strategies that inform environmental policy, the scientific community, and thousands of concerned citizens in the Bay Area and beyond. Through the careful stewardship of wildlife sanctuaries, participation in regional habitat protection, and formal scientific contributions that address important issues in conservation, ACR works to preserve biodiversity and protect endangered and threatened species at local, regional, and global scales.

    NATURE EDUCATION. The Nature Education Program connects children and adults with nature, cultivates environmental literacy, and promotes stewardship of the earth through hands-on inquiry programs. Nature Education Programming includes three focus areas that are interwoven through innovative delivery models:

    School Programs. Long trusted as a leader in the field of intergenerational nature education, ACR’s programs for school groups in grades three, four, and five cultivate ecological literacy and promote stewardship of the earth through hands-on, inquiry-based nature education. Docent-led, small group instruction allows for very intimate and personal connections to ACR’s preserves. The School Program model consists of a visit to an ACR preserve for a three-hour, docent-led nature hike; a pre-visit, in-class orientation; and a set of standards-based resources for teachers to develop classroom activities related to the nature-hike content.

    Youth Environmental Stewardship Programs. To extend the reach and impact of its nature education programming, ACR targets specific youth communities to cultivate future environmental stewards and leaders. These programs, designed to nurture enduring relationships and long-term engagement with ACR, range from overnight experiences, to conservation stewardship projects for classroom or youth groups, to extended nature education mentoring through high school.

    Lifelong Learning Programs. Since its inception, ACR has engaged diverse, multigenerational communities in learning within and from nature. Docents receive extensive training to facilitate School Program activities. Volunteer Ranch and Trail Guides provide orientation and natural history information to Preserve visitors. ACR’s public programs offer nature hikes, classes, lectures, and outreach to families. The Land Stewards Program engages volunteers in restoration projects, citizen science efforts, and conservation science research.

  • History:
  • Audubon Canyon Ranch was founded to protect from development a large heron and egret heronry on Bolinas Lagoon near Stinson Beach, California. Today, Audubon Canyon Ranch acts as guardian of four main nature preserves in Marin and Sonoma counties. These 5,000 acres of tidal flats, marshlands, coastal prairie, oak woodlands and redwood groves provide significant habitat to wildlife and have been placed in our care by generous donors to steward and protect in perpetuity.

    MARTIN GRIFFIN PRESERVE. In the early 1960s, Marin County’s political climate was pro-growth. A 503-acre dairy ranch was being subdivided for development; the redwood grove where herons and egrets nested was to be logged, and the lagoon was to be developed as a marina. A four-lane freeway was to be built between the nesting site and feeding ground. Dr. Martin 'Marty' Griffin, Jr., then-president of the Marin Audubon Society, became aware of the pending development and asked for a meeting with the owner of the Canyon Ranch property, which included the nesting grove of redwood trees. Marin Audubon's objective was to purchase the property. With the help of many dedicated individuals and the other Audubon Society chapters, a grassroots fundraising campaign was waged. The land was purchased, saving it from development and the heronry from ruin.

    A long history of land preservation had begun. In 1962, Audubon Canyon Ranch (ACR) was formally created as a locally based independent nonprofit organization, and the Bolinas Lagoon Preserve (later renamed Martin Griffin Preserve) became its first preserve. Soon thereafter 500 more acres were acquired, forming today's 1,000-acre Martin Griffin Preserve.

    BOUVERIE PRESERVE. David Bouverie, a London-architect-turned-Sonoma-County-landowner, cared deeply for his land and was enthusiastic about ACR's education programs. He wanted his property to be used to educate and inspire children to appreciate nature. The education programs that had taught thousands of schoolchildren at the Martin Griffin Preserve were duplicated at the Bouverie Preserve, and soon Bay Area students and trained Bouverie Docents were walking the trails and studying native plants and animals. When Bouverie passed away in 1994, ownership of the 500-acre Bouverie Preserve—known for its wildflowers, oak woodlands and creek canyon—was transferred to ACR in a planned giving arrangement.

    CYPRESS GROVE RESEARCH CENTER. With hundreds of acres successfully preserved in perpetuity in southern coastal Marin County, ACR leadership became interested in conserving land along Tomales Bay. Marty Griffin approached landowner Clifford Conly to discuss his property on the northeastern edge of the bay. Clifford became impressed with ACR's efforts to protect important tidelands along the bay, and a relationship began. During a 1976 interview, Clifford stated his intention to leave his beautiful shoreline property to Audubon Canyon Ranch for its conservation science programs and to be preserved in perpetuity. In 1992, Clifford completed his gift and Cypress Grove Research Center became the headquarters for ACR's conservation science programs.

    MODINI MAYACAMAS PRESERVES. The rugged mountains running north of Mount St. Helena is the split between Lake County to the east and Sonoma County to the west. It is home to black bears and mountain lions, rare plants that grow in the harshest conditions, numerous species of birds, natural springs, and dramatic waterfalls. This is also home to two properties, acquired separately, that came together to form the Modini Mayacamas Preserves. In 2009, ACR entered into an agreement with ranchers Jim and Shirley Modini to acquire the 1,725-acre Modini Ranch. This wild jewel in the mountains, which had been lovingly tended by the family since 1857, came to ACR in 2013 as the Modini Ingalls Ecological Preserve. Just prior, in May 2012, ACR acquired the adjacent 1,620-acre Mayacamas Mountains Audubon Sanctuary from the National Audubon Society. The two properties, at 3,370 acres, are now collectively known as the Modini Mayacamas Preserves.

    In January 2010, ACR hired its second executive director, J. Scott Feierabend, when long-time executive director Skip Schwartz transitioned to a part-time role. Built on a history of commitment to land preservation and the community that makes it happen, ACR is well positioned to advance the organization's mission with confidence and enthusiasm into the next 50 years . . . and beyond.

  • Year established:1962
  • Endowment:Unknown


  • Executive / Trustee board size:25
  • Advisory board size:0
  • Staff size:30


  • Organization type:Grantseeker
  • Country of registration:United States
  • Tax Determination Letter:Received Determination Letter
  • IRS Section:501(c)(3)
  • IRS Subsection:None
  • Tax ID:94-6069140

IRS Business Master File Information

  • EIN:946069140
  • Organization Name:AUDUBON CANYON RANCH INC
  • Sort (Secondary) Name:
  • Care Of Name:
  • Organization Address:4900 SHORELINE HIGHWAY 1
  • Organization City:STINSON BEACH
  • Organization State:CA
  • Organization Zip:94970-9701
  • Group Exemption Number:0000
  • Subsection Code:03
  • Classification Code(s):2
  • Subsection/Classification Desc.:Educational Organization
  • Affiliation Code:3
  • Ruling Date:July, 1964
  • Deductibility Code:1
  • Foundation Code:15
  • Foundation Code Desc.:Organization which receives a substantial part of its support from a governmental unit or the general public 170(b)(1)(A)(vi)
  • Activity Code(s):350
  • Activity Code Desc.(s):Preservation of natural resources (conservation)
  • Organization Code:1 (Corporation)
  • Exempt Org. Status Code:01 (Unconditional Exemption)
  • Tax Period:June, 2016
  • Filing Requirement Category:01 (990 (all other) or 990EZ return)
  • Accounting Period:June
  • NTEE Code:C300
  • Asset Amount:$37,852,719
  • Asset Code:8 ($10,000,000 - $49,999,999)
  • Income Amount:$5,479,157
  • Income Code:7 ($5,000,000 - $9,999,999)
  • 990 Revenue Amount:$2,445,721
  • Last Updated:2/18/2018 11:59:26 am

This information is directly from the IRS Exempt Organization Business Master File at Exempt Organizations Business Master File Extract. This information is not under the control of the Common Grant Application and is collected and compiled and can only be changed by the IRS.