Bob Middagh Trail

A public-proposed trail project balances preservation and visitor safety.


Trail Work Complete

Work on this project is complete. Consistent with a recent decision by the Marin County Superior Court, the Bob Middagh Trail is currently available for hiking and equestrian use, but not bicycle use. The Marin County Open Space District (MCOSD) will keep the public updated.

Project Description

The Bob Middagh Trail was originally constructed as an access road for installation of a Marin Municipal Water District water line. The road narrowed over time and became an important trail connection for open space visitors traveling to Camino Alto Preserve and contiguous lands to the west. The Marin County Bicycle Coalition initiated consideration of the project via the public proposals process.


  • Realign 1,952 feet of new trail.
  • Decommission of 938 feet of existing trail.
  • Install four sloped climbing turns.
  • Install three rock retention walls.
  • Remove one eight to ten inch diameter arroyo willow tree.
  • Construct one rock armor swale 20 feet wide by ten feet long.
  • Replace two failing culverts.
  • Change use designation to allow bicycles


  • 2015: Project Identified
  • 2016  Community Outreach
  • 2017: CEQA Review
  • 2018: Project Complete