The Marin County Open Space District (MCOSD) manages approximately 155 miles of fire roads and trails on 34 open space preserves. Certain fire roads and trails are temporarily closed because of wet weather conditions, natural hazards, wildland fire, construction activities, and/or resource restoration projects. Fire roads and trails are closed to protect natural resources and user safety. Depending on site conditions, closures may affect some or all uses including bicyclists, equestrians, pedestrians, and vehicles.
MCOSD posts closure signs at trailheads to notify visitors of current use restrictions and to remind visitors to use alternate routes. Please cooperate with closure restrictions while visiting MCOSD lands; violators are subject to citation. Conditions and closures may change without notice on a daily basis due to weather, natural hazards, wildland fire, and/or MCOSD activities. Visit related pages to learn about safety, MCOSD rules and regulations, and MCOSD policies.
View the MCOSD Seasonal Closures Google map.
As part of the San Geronimo Valley Upland Habitat Restoration Project, repairs to the Willis Evans Trail were completed October 2011. Newly repaired roads and trails are prone to damage from bicycle tires and horse hooves, especially during or after a storm that causes the surface to soften. The Willis Evans Trail and the 680 Trail need to cure during the winter season before it is ready for multiuse. Please heed the seasonal closure in effect and do not ride bicycles or horses on the Willis Evans Trail or the 680 Trail.
Cascade Fire Road closes to vehicles, for natural resource protection.
Current status: Closed.
Conifer Fire Road closes to vehicles, for natural resource protection.
Current status: Closed.
Cortez Fire Road closes to vehicles, for natural resource protection.
Current status: Closed.
East Sylvestris Fire Road closes to vehicles, for natural resource protection.
Current status: Closed.
Manzanita Fire Road closes to vehicles, for natural resource protection.
Current status: Closed.
San Geronimo Ridge Fire Road East closes to vehicles, for natural resource protection.
Current status: Closed.
San Geronimo Ridge Fire Road West closes to vehicles, for natural resource protection.
Current status: Closed.
Summit Fire Road closes to vehicles, for natural resource protection.
Current status: Closed.
White Hill Fire Road closes to vehicles, for natural resource protection.
Current status: Closed.
The Willis Evans Trail closes to bicyclists and equestrians, for Coho salmon habitat protection.
Current status: Closed.
The Upper Meadow Trail closes to equestrians, for soil conservation.
Current status: Closed.
The Deer Camp Cutoff Trail closes to equestrians, for soil conservation.
Current status: Closed.
The Roy’s Redwoods Loop Trail closes to equestrians, for soil conservation.
Current status: Closed.
No project-related closures at this time.
For questions about MCOSD road and trail closures, contact Superintendent Brian Sanford at bsanford@marincounty.org or (415) 473-7473.