Bothin Marsh and Sausalito-Mill Valley Path

  • Particularly good for families
  • Hiking
  • Bicycling
  • Picnic


  • Accessible Restrooms
  • Accessible Parking
  • Particularly good for families
  • Hiking
  • Bicycling


Bayfront Park, 498 Sycamore Ave., Mill Valley, CA, 94941
San Francisco Bay Area
Info: (Mar) inC-ount yParksandOpenSpaceBo
Bothin Marsh: Open 24 hours. Bayfront Park: From a half-hour before sunrise to a half-hour after sunset.
Off leash
Dogs are allowed off leash in the fenced in dog play area at Bayfront Park; elsewhere in Bayfront Park and along the trail through Bothin Marsh they must be on leash.
Last Reviewed:
March 2013
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A wide, level asphalt section of the Bay Trail known as the Mill Valley-Sausalito Path, popular with cyclists, runners, and rollerbladers, follows the old Northwestern Pacific Railroad route from Sausalito to Mill Valley. Along the way it crosses Bothin Marsh Open Space Preserve, 112 acres of open space and restored salt marsh with dirt trails that may be accessible during the dry season. The marsh attracts more than 400 species of migratory birds in winter, as well as providing habitat for native birds and other wildlife. You can continue north on the trail to Bayfront Park in Mill Valley.

Trails and Pathways

Sausalito-Mill Valley Path
Trailhead Location:
Off Pohono St. in the Shoreline Office Center parking lot
Trail Length:
2-4 total miles
Typical Width:
4 ft. & above
Typical Grade:
Mostly gentle
Typical Terrain:
Trail Overview:

From the Pohono Street trailhead, the trail travels under the Richardson Bay Bridge, then follows the edge of the marsh, crossing four small wooden bridges that rise over creeks and channels. When bicycle traffic is light, these are great places to watch for marine life as the tide surges in or out, but they may be flooded during very high tides, especially after heavy rains. Shorebirds abound and interpretive panels give historical and ecological information about Richardson Bay. On a clear day, Mount Tamalpais looms to the north as you travel this stretch of trail.

About 1.5 miles out, you come to 14-acre Bayfront Park, which surrounds a quiet inlet at the northernmost tip of Richardson Bay. The western side of the park contains a dog run, sports fields, a skateboard park, and picnic tables. A bridge with a two-inch ledge at both ends leads to the park's eastern side, with a playground, softball field, and more sports fields. From the east-side parking lot, a paved trail leads south a few hundred yards. At the "Public Shoreline" sign, follow the decomposed-granite trail uphill to an overlook with a view of the lagoon below. In my power wheelchair I safely climbed a steep section with a cross-slope, but people in manual wheelchairs may need assistance. Steps lead down from the crest of the hill to a .25-mile trail that hugs the shoreline, traveling behind a landscaped condominium complex. To reach this section by wheelchair you need to backtrack to the shoreline sign and continue on the sidewalk, turning onto Shelter Bay Avenue where it dead-ends at the trail.


The facilities listed below meet all of our access criteria unless otherwise noted.
Accessible Parking:
Yes – designated accessible parking, van accessible, firm, level or slope no greater than 2%;

Parking for the Mill Valley-Sausalito Path trailhead is in the Shoreline Office Center parking lot off Pohono St. in Sausalito; none of the designated Bay Trail spots at the lot's northern end are signed as accessible, but if you have a placard you can park in any of the spaces that are. At Bayfront Park, several accessible spots are in the Mill Valley Middle School lot off Sycamore Ave. on the park's western side and in the lots off Hamilton Dr. on the eastern side.

Accessible Restroom:
Yes – At Bayfront Park, accessible restrooms are on the eastern side, in the northernmost parking lot off Hamilton Dr. (tight 90-degree turn to enter). Public restrooms at the Sewerage Agency building off Sycamore Ave. on the park's western side were locked when I visited, and I was unable to verify their accessibility. 

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