Bothin Marsh

History of Bothin Marsh 

Bothin Marsh once extended from the Marin Headlands into the Mill Valley foothills, but like many bayside marshes and wetland areas, it has weathered through its share of threats through the years.

1800s: Bothin Marsh named after original owner Henry Bothin

1970: Developer KSW Properties fills in and builds on portions of the extensive marsh

1975: Trust for Public Land purchases remaining marsh area

1981: Marin County Parks and Open Space District formally acquires the marsh and easement across the old railroad tracks


Photo: Diana Clock

Bothin Marsh is a beautiful marsh over 100 acres in size on the north end of Richardson Bay alongside a well-traveled section of the Bay Trail. This Marin County Open Space District Preserve is a mix of tidal wetlands, sloughs and Bay that provides habitat for hundreds of native bird and wildlife species, including the endangered salt marsh harvest mouse and California clapper rail. It's also a resting stop for over 400 species of migratory birds traveling on the Pacific Flyway. The Bothin Marsh Preserve includes tidal wetlands in the north end of Richardson Bay.


Photo: Diana Clock

Save The Bay Restores Bothin Marsh

In comparison to some of Save The Bay's restoration sites, Bothin Marsh is a relatively healthy marsh. Yet to ensure that this historic wetland is preserved in perpetuity, the Marin County Parks and Open Space District (MCPOSD) and Save The Bay are partnering to control invasive plants, and create upland habitat for endangered wildlife.

Goals of this restoration project include:

  • Provide refuge for wildlife by planting native wetland plants such as monkey flower and gumplant  
  • Create a natural buffer of native wetland plants between the heavily-used trails and the marsh to encourage people and dogs to stay on the trail and out of the sensitive wetland area
  • Eradicate invasive iceplant to allow for growth of native plants
  • Monitor plant growth and map invasive plant species for future removal