About MCL
A Giant Conservation Legacy
During its first 40 years, Marin Conservation League focused much of its work on identifying scenic lands at risk of development and helping secure them for public ownership, protection, and preservation. Many of those lands became some of the most iconic and cherished places in Marin and Northern California. Over time, MCL’s early emphasis on land acquisition expanded into a lasting commitment to stewardship of public lands, a responsibility that remains central to its mission today.
Use the map below to explore some of MCL’s historic conservation successes and lasting achievements.
MCL Legacy
Click on an park or open space on the map to learn more about MCL's conservation legacy.
Drakes Bay Beach
MCL worked with many allies in the early 1960s to defeat a proposal to construct a nuclear power plant on Bodega Head, and a decade later led a campaign to oppose opening up the Marin-Sonoma coast to off-shore oil drilling.
Point Reyes National Seashore
Provided years-long support leading up to signing of Point Reyes as a National Seashore in 1962 and in contributing financial and other support for Save Our Seashore campaign to secure congressional funding for acquisition of farmlands within the Seashore boundaries in 1969.
Bodega Head and the Marin-Sonoma Coast
MCL worked with many allies in the early 1960s to defeat a proposal to construct a nuclear power plant on Bodega Head, and a decade later led a campaign to oppose opening up the Marin-Sonoma coast to off-shore oil drilling.
Tomales Bay State Park
MCL contributed funds and thousands of volunteer hours over a period of 10 years to enable five sandy beaches and acres of Bishop Pine forest on Tomales Bay to eventually become a State Park in 1951.
Samuel P. Taylor State Park
In 1940 MCL began a five-year struggle, involving many trips to Sacramento and numerous conversations with the San Francisco landowner, to turn the 2,332-acre Camp Taylor property into a state park. MCL negotiated the sale, persuaded the County's State Assemblyman and Senator to introduce an appropriations bill to obtain sufficient funds to pay for the land, less the taxes due, and then convinced the County Board of Supervisors to forgive $32,000 in delinquent taxes as the County's contribution.
Bolinas Lagoon
Along with Audubon Canyon Ranch and The Nature Conservancy, contributed funds to purchase Kent Island, a key property in Bolinas Lagoon, effectively blocking development of the Lagoon for a large resort complex.
Mt. Tamalpais
One of the first efforts of the fledgling organization was to join with the Tamalpais Conservation Club in 1934 to add 531 acres to the park, which was begun a few years earlier with William Kent's donation of 200 acres in Steep Ravine. Fearing commercialization on Mt. Tamalpais, MCL developed a set of criteria in 1963 to guide appropriate, environmentally-conscious uses on the mountain, gaining the support of all communities that adjoin the mountain as well as the cooperation of Marin Municipal Water District and State Parks
Northridge and Marin County Open Space District
MCL initiated a multi-year massive grassroots campaign involving the County, Corte Madera, and Larkspur in acquiring, parcel by parcel, lands that make up the eastern ridges and slopes of Mt. Tamalpais - "Northridge" - and through this effort was instrumental in establishing Marin County Open Space District in 1972 and gaining voter approval to fund the District.
Angel Island
When the island was declared surplus by the federal government, MCL formed the Angel Island Foundation to save it rather than let it go on the auction block for private development. MCL underwrote police and fire service for the island to delay the auction until the State Park Commission would accept the first deed to a portion of the island. State acquisition began in 1954, and with the final purchase, a 740-acre island in San Francisco Bay was preserved for all time. The island's mountaintop was renamed Mount Caroline Livermore in honor of the MCL's founder who led the campaign to create Angel Island State Park.
Richardson Bay
MCL worked closely with the newly formed Marin Audubon Society and City of Belvedere to prevent 900 acres of Richardson Bay from being filled for residential development. MCL also supported Save the Bay, with a focus on Richardson Bay, during formation of the San Francisco Bay Conservation and Development Commission throughout 1960s.
Ring Mountain
MCL participated in planning efforts to save most of Ring Mountain from development and supported The Nature Conservancy's (TNC) purchase of roughly one-third of the mountain above Paradise Drive in Corte Madera. The Marin County Open Space District currently owns and co-manages the 367-acre Ring Mountain Preserve with TNC.
Heerdt Marsh
MCL lobbied and assisted with fundraising to stop plans to fill and dredge a 69-acre salt marsh south of the mouth of Corte Madera Creek. In 1976 the State of California became owner of the marsh, which is now part of the Corte Madera Marsh Ecological Reserve under management of the State Department of Fish and Game.
Golden Gate National Recreation Area
MCL represented County interests in saving the Marin Headlands for a park and provided technical assistance in the campaign of People for a Golden Gate National Recreation Area (GGNRA) campaign to establish the national park and expand its boundaries in Marin.
Rancho Olompali
MCL worked with the Marin County Parks to have the 670-acre parcel off Highway 101 north of Novato declared a State Historical Park in 1977. The land contains a major Miwok village site and other evidences of indigenous habitation for thousands of years
Hamilton Airfield
MCL devoted many years to permanently thwart any plans to convert to a commercial airport, and supported the restoration of the 750-acres of runway and ground facilities to tidal wetlands and repurposing of the hangars for commercial uses. as alternatives.
Stinson Beach Park
MCL negotiated with the Marin County Board of Supervisors to persuade them to purchase the Fitzhenry property at Willow Camp, now known as Stinson Beach. The County purchased the shoreline for $20,000. It later became Marin's first state park before becoming part of GGNRA.
Bolinas Ridge
MCL directly confronted and resisted movement of logging trucks engaged in clearing Douglas fir forests on Bolinas Ridge in the late 1960s, and successfully got the County to adopt an ordinance forbidding logging in Marin.
Beyond the Map
The places highlighted above tell only part of MCL’s story. For nearly a century, MCL has helped shape the policies, partnerships, and public institutions that continue to protect Marin’s environment and guide its future.
Building the Foundation



One of MCL’s earliest achievements was helping fund Marin County’s first comprehensive planning effort, the Pomeroy Plan, which laid the groundwork for balancing growth with conservation. In the decades that followed, MCL continued to shape the Countywide Plan, advocate for thoughtful land use, and champion policies that protected the landscapes and communities that define Marin.
Protecting Coast, Farms, and Public Lands



Beyond the parks and open spaces shown on the map, MCL helped advance the California Coastal Act, supported protections for Marin’s working agricultural lands, and played an important role in establishing long-term conservation policies. MCL continues to steward the public lands it helped preserve, which today make up more than half of Marin County.
Leading New Environmental Solutions



As environmental challenges changed, so did MCL’s work. MCL helped launch Marin’s first curbside recycling program, brought together business, government, and environmental leaders through its Business-Environment Breakfast series, and founded the Climate Action Working Group to educate, collaborate, and advance practical climate solutions.
Meeting Today’s Challenges



Today, MCL builds on its conservation legacy by addressing the challenges shaping Marin’s future. MCL advocates for climate resilience, sustainable transportation, clean energy, healthy watersheds, wildfire preparedness, habitat protection, and thoughtful public policy. While the issues have evolved, MCL’s mission remains the same: protecting Marin’s natural environment for future generations.
