About MCL

MCL’s Environmental Advocacy is More Vital Now than Ever Before.

The landscapes that define modern Marin County, from its open ridgelines and parks to watersheds and coastline, are the result of generations of people who believed these places were worth protecting.

Since 1934, Marin Conservation League has been a key part of that effort. As Marin’s oldest environmental organization, MCL has helped shape many of the conservation achievements that define the county today. Working alongside engaged citizens, public agencies, and community leaders, MCL has advocated for the protection of open space, the stewardship of public lands, and the thoughtful planning that has allowed Marin to grow while preserving its unique natural character.

Serving as both watchdog and advocate, MCL helps ensure that environmental considerations remain part of the public decisions that shape Marin’s future. Our volunteers and staff review major plans, policies, and development proposals, engage with decision-makers, and bring scientific, technical, and local knowledge to issues that affect communities throughout the county.

The conservation challenges facing Marin have evolved over the past 90 years. Today, MCL also addresses the environmental consequences of a changing climate, a growing population, and increasing demands on the county’s natural resources. In each case, our goal is the same: to ensure that Marin’s future is shaped by decisions that sustain both the environment and the communities that depend upon it.

For more than 90 years, Marin Conservation League has helped protect what makes Marin special. We remain committed to preserving, protecting, and enhancing Marin County’s natural assets for future generations.

Mission

To preserve, protect and enhance the natural assets of Marin in a changing environment

Vision

An ecologically diverse and resilient natural environment that is valued and cared for by a thriving, engaged community

MCL Values

Independent Advocacy

For more than 90 years, MCL has provided an independent voice for the environment in Marin County. We evaluate issues based on their environmental impacts and advocate for decisions that protect the county’s long-term ecological health.

Science-Based Decisions

MCL’s positions are informed by the best available science, technical expertise, and local knowledge. We believe sound environmental policy depends on credible information, careful analysis, and a commitment to evidence-based solutions.

Long-Term Stewardship

Many of Marin’s defining conservation successes were achieved through decades of persistence and public engagement. We work to ensure that today’s decisions protect the environmental resources future generations will inherit.

Collaboration

Protecting Marin’s environment requires cooperation among citizens, public agencies, ans community organizations. MCL works constructively with diverse stakeholders to advance practical and lasting conservation outcomes.

Climate Resilience

Climate change affects nearly every environmental issue facing Marin today. MCL integrates climate resilience and adaptation into its advocacy while continuing to protect biodiversity, natural systems, and the communities that depend upon them.