Marin County Parks and Open Space Department

Trail Updates

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The Carey Camp Trail in Cascade Canyon Preserve is closed indefinitely for public safety. A slide occured in the area and there is risk of falling debris. The area is being evaluated.

The Marin County Open Space District (MCOSD) manages approximately 249 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.

The 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 the 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 the MCOSD activities. Visit related pages to learn about safety, rules and regulations, and the MCOSD policies. For questions about the MCOSD fire road and trail closures, contact Superintendent Brian Sanford at (415) 473-7473.

Road and Trail Project - Related Closures

2016 Trail Work: Protect Newly Improved Trails with Seasonal Closures


Road and trail improvements have ramped up to implement the Road and Trail Management Plan, adopted in 2014. The vision is to establish and maintain an official, sustainable system of roads and trails that improves the visitor experience while reducing environmental impacts.

With the arrival of October rains, the MCOSD wrapped up its first full season of implementing trail improvements envisioned by the plan. To protect native wildlife while improving the trail for visitors, roads and trails were improved for visitor safety, to enhance drainage, reduce soil erosion, restore habitat, and prevent sediment from entering streams.

When the wet weather arrives, crews apply rice straw, straw waddles, and silt fencing, following best management practices to reduce erosion on newly improved trails. Crews close project sites for the rainy season to allow the soils to settle and compact naturally. Staff monitor projects throughout the winter, especially after storms, to identify any drainage and erosion issues.

Please respect the following seasonal closures to help protect our roads and trails from ruts, potholes, and erosion! The trails will reopen for users when conditions are suitable, as determined by the MCOSD.

  • Roy's Redwood Loop Trail Closed to Horses. Among other visitor safety improvements, five bridges and two small water crossings were installed on the Roy’s Redwoods Loop Trail in Roy’s Redwoods Preserve in the San Geronimo Valley to reduce erosion in the San Geronimo Creek Watershed.
  • Gary Giacomini Boulder Springs Trail and Willis Evans Trail Closed to Bikes and Horses. The Candelero Canyon Trail and the Contour Trail complex, including the Boulder Springs Trail (formerly known as Landbridge) were adopted into the official system and crews made the necessary drainage and safety improvements. Still to come is the decommissioning of some social trails in the Gary Giacomini Preserve, restoring over 8,000 square feet of native Mt. Tam manzanita and redwood forest habitat.
  • Loma Alta Old Railroad Grade Trail is Closed to Bikes and Horses. Work in Loma Alta included the restoration of approximately 10,000 square feet of oak and bay woodland habitat, re-alignment of a portion of the Old Railroad Grade Trail, and installation of a bridge to reduce sedimentation in Corte Madera Creek watershed and for visitor safety.
  • Camino Alto Octopus Trail and Val Vista Trail Closed to Bikes and Horses. The Octopus Trail, a multiuse connector in Camino Alto Preserve between Mill Valley and Corte Madera, was officially adopted. The surrounding social trails were decommissioned to protect habitat and enhance recreational opportunities.

Seasonal Fire Road Closures

Baltimore Canyon Preserve

Citron Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Blithedale Summit Preserve

Middle Summit Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Glen Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Camino Alto Preserve

Del Casa Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Cascade Canyon Preserve

Cascade Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Gary Giacomini Preserve

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

Horse Hill Preserve

Horse Hill Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Loma Alto Preserve

Smith Ridge Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Sunrise Fire Road (formerly Gunshot Fire Road) closes to vehicles, for natural resource protection.
Current status: Closed

Loma Verde Preserve

Chicken Shack Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Little Cat Road Fire closes to vehicles, for natural resource protection.
Current status: Closed

Pebble Beach Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Ponti Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Via Escondia Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Winged Foot Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Lucas Valley Preserve

Luiz Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Ring Mountain Preserve

Endeavor Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Reed Ranch Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Terra Linda/Sleepy Hollow Preserve

Cemetery Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Del Ganado Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Mt. Muir Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Ridgewood Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Terra Linda Ridge Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

White Hill Preserve

White Hill Fire Road closes to vehicles, for natural resource protection.
Current status: Closed

Seasonal Trail Closures

Gary Giacomini Preserve

The Willis Evans Trail closes to bicyclists and equestrians, for Coho salmon habitat protection.
Current status: Closed

Indian Tree Preserve

The Upper Meadow Trail closes to equestrians, for soil conservation.
Current status: Closed

The Rent Barn Trail closes to equestrians, for soil conservation.
Current status: Closed

The Deer Camp Cutoff Trail closes to equestrians, for soil conservation.
Current status: Closed

Roy’s Redwoods Preserve

The Roy’s Redwoods Loop Trail closes to equestrians, for soil conservation.
Current status: Closed

The Sprint Rock Trail closes to equestrians, for soil conservation.
Current status: Closed

Updated On:

2.2.17

We update this page when closures, openings, or conditions change.