Bothin Marsh Preserve

A tidal sanctuary in the heart of Mill Valley.


The most popular entry for Bothin Marsh is on the 800 block of Miller Avenue, Mill Valley. From Highway 101, take exit 445B west towards Mill Valley, turn right at Miller Avenue. MCOSD gate is on the right, across from Almonte Boulevard.


Street parking only. Please be respectful of local residents. Do not block streets, gates, or driveways.

Public Transit

You can also dial 511 to find out about transit options from your location.