Marin County Parks and Open Space Department

The Marin County Open Space District (MCOSD) manages 250 miles of roads and trails on 34 open space preserves. Roads and trails may be temporarily closed, or use restricted, due to safety, wet weather, natural hazards, wildland fire, construction, or restoration. Please cooperate with closure signs and notices, and take alternate routes.

Project Impacts and Closures: Roads and Trails

Horse Hill Preserve

Horse Hill Trail is being extended 2000 feet. Gasline Trail is being decommissioned due to steep terrain and erosion. Construction will begin on May 15, 2017 and is expected to be completed by the end of June. Please comply with posted trail caution or closure signs while work is taking place.

Terra Linda/Sleepy Hollow Preserve

Irving Fire Road will be closed beginning May 15, 2017. Construction is expected to be completed by the end of June. Work is being done to reduce sedimentation, improve visitor access and safety, and maintain emergency access. Please comply with posted trail caution or closure signs while work is taking place.

Seasonal Closures: Roads and Trails

Roads and trails may be closed during the rainy season, typically November through March, for visitor safety and natural resources protection.

Updated On:

5.8.17

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