Road & Trail System Designation

Creating a sustainable system of open space roads and trails.

UPDATED: JANUARY 24, 2019

Designation Status

Marin County open space preserves include over 249 miles of unpaved roads and trails, Many were originally built as logging and ranch roads, fire and emergency access roads, or for utility access. Informal trails also developed from repeated recreational use. These roads and trails evolved without balancing the need to optimize recreational experiences while protecting natural resources and maintaining community safety.

In 2015, the MCOSD began a collaborative public process to formally designate a road and trail system in Marin County's preserves. This process is taking place on a region by region basis. The objective is to map all designated roads and trails, and identify permitted uses, and provide a basis for annual review of open space road and trail projects.

Region 1: Six Preserves in South Marin
Includes Alto Bowl, Baltimore Canyon, Blithedale Summit, Camino Alto, Horse Hill, and King MountainPreserves. The first formal designation of Region 1 is complete.

Region 2: Seven Preserves in West Marin
Includes Cascade Canyon, French Ranch, Gary Giacomini, Loma Alta, Maurice Thorner Memorial, Roy’s Redwoods, and White Hill Preserves. The first formal designation of Region 2 is complete.

Region 3: Five Preserves in Central Marin
Includes Indian Valley, Ignacio Valley, Loma Verde, Lucas Valley, and Pacheco Valle Preserves. The first formal designation of Region 3 is complete.

Region 4: Six Preserves in North Marin
Includes Deer Island, Indian Tree, Little Mountain, Mount Burdell, Rush Creek, and Verissimo Hills Preserves. The first formal designation of Region 4 is complete.

Region 5: Five Preserves in Central Marin
Includes Bald Hill, San Pedro Mountain, Santa Margarita Island, Santa Venetia Marsh, and Terra Linda/Sleepy Hollow Preserves.The first formal designation of Region 5 is complete.

Region 6: Five Preserves in South Marin
Includes Bolinas Lagoon, Bothin Marsh, Old Saint Hilary’s, Ring Mountain, and Tiburon Ridge Preserves, as well as the Strawberry shoreline and various water lots. The formal designation process for Region 6 is being planned.