Ponti Ridge

Converting an unsustainable and steep fire road to a multiuse trail in Pacheco Valle.

UPDATED: July 16, 2019

Trail Work Begins

The Marin County Open Space District (MCOSD) has begun work on Ponti Ridge, which is a large scale, long term project. Crews and equipment will be entering the work area in Pacheco Valle Preserve via Queenstone Fire Road from Miller Creek Road. This project will convert an unsustainable and steep fire road to a multiuse trail. Check the Alerts and Closures page for updates on access to roads and trails while work is taking place.

Project Description

Used year-round as a recreational trail, with a lower segment accessible by emergency vehicles, the upper segment of Ponti Fire Road is geologically unstable. A section of the fire road experienced a major landslide in 2005. the proposed project was identified as a potential road to multi-use trail conversion project during the Region 3 proposed designation process in August 2016. The purpose of the proposed project is to implement the MCOSD Road and Trail Management Plan to provide the public with a safe multi-use trail system to enhance to visitor experience, reduce the environmental impacts on sensitive resources by reducing sedimentation and erosion, and establish a sustainable system of roads and trails that meet design and management standards and would provide year-round access along the trail alignment.

This project is being developed in conjunction with the Marinwood Fire Department, Novato Fire Protection District, Marin County Fire Department, Marinwood Community Services District, open space neighbors, and the Marin County environmental community.


  • Reduce environmental impact.
  • Reduce risk of landslide potential.
  • Maintain emergency access.
  • Improve trail safety.
  • Improve trail sustainability.
  • Improve the visitor experience.


  • 2016: Project Identified
  • 2016–2018: Project Planning
  • Summer/Fall 2018: Project Description
  • Fall 2018: Stakeholder Review
  • Spring 2019: CEQA Review