Bothin Marsh Preserve

A cherished stretch of shoreline surrounded by residential communities

Evolving Shorelines

The shoreline along Bothin Marsh Preserve provides recreation and natural beauty for residents and visitors in southern Marin. The marsh also provides habitat for unique plants and animals. With current sea level rise projections, this preserve will lose a significant amount of vital wetland habitat by 2030. The Mill Valley-Sausalito Multiuse Pathway, which runs through the marsh, will also be greatly affected by increased frequency and severity of flooding. As One Tam partners, the Marin County Open Space District and the Golden Gate National Parks Conservancy are working with scientists to assess existing conditions and potential future impacts from sea level rise related to climate change. Sea level rise adaptation designs are being developed to preserve the marsh and protect the pathway. Community feedback is welcome. Learn more about Evolving Shorelines.

Rangers Recommend

Naturalist Notes

  • This tidal wetland is a small reminder of the vast salt marshes that once surrounded San Francisco Bay.
  • The marsh serves more than 400 species of migratory birds traveling on the Pacific Flyway. Observe birds and wildlife quietly from a distance. Migrating birds are resting after their long flights.
  • The preserve is home to the endangered salt marsh harvest mouse and Ridgeway's rail.
  • Bothin Marsh is at the center of discussions about how climate change is affecting Marin coastlines.
  • Check out the iNaturalist field guide. Add your own observations.


dog on leash
Dogs On Leash
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Dogs Voice Control
Kayak Canoe

Know Before You Go

  • Stay on roads and trails to preserve sensitive ecosystems and to avoid trespassing on private property.
  • Dress appropriately for the weather. Trails can be muddy during the rainy season.
  • Bring water.
  • There are no restrooms at this location.
  • Steer clear of poison oak.
  • After an outing, check for ticks.