News Release

Posted on: March 23, 2017

Mt. Tamalpais Watershed Road Closure Update

Concrete Pipe Slide_CP-27_20170221_082456_resized (2).jpg

  • Bolinas-Fairfax Road (between Azalea Hill and Highway One) – Managed by Marin County Department of Public Works. This road is closed. To learn more: http://www.marincounty.org/depts/pw/contact-us
  • Bon Tempe Dam Road – Open.
  • Concrete Pipe Road (between 5-corner & Bolinas-Fairfax Road) – Closed due to two major slides.
  • Lower Eldridge Grade (between Filter Plant Road and Lakeview Road) – Closed. It will remain closed until repaired. Repairs may take a couple months.
  • Old Railroad Grade Road – Managed by Marin County Parks. This road is now open. To learn more: http://www.marincountyparks.org/depts/pk/contact-us

  • San Geronimo Ridge Road – Open. Bikers, hikers and horses may proceed with caution. Nearby trees will be cleared as soon as the soils are less saturated allowing heavy equipment access - possibly April or May.
  • Shafter Grade Road – Impacted by a large slide. Bikers, hikers and horses may proceed with caution. The trees will be cleared as soon as the soils are less saturated allowing heavy equipment access - possibly April or May. Slides on Shafter, Peters and San Geronimo Ridge roads are in the same vicinity and will be cleared during the same time period.
  • Sky Oaks Road – Open.
  • Upper Peters Dam Road (between the dam and intersection with Continental Cove) – Closed due to a large fallen fir tree that has taken down PG&E and AT&T lines. The tree will be cleared as soon as the soils are less saturated allowing heavy equipment access - possibly April or May. 
  • Other Road and Trail Storm Damage – Many other roads and trails on the watershed have suffered storm damage such as slides and downed trees. Please stay alert and use caution. Notable routes include Deer Park Road, Old Railroad Grade and East Portal, Pine Mountain Tunnel Road, Shadyside Trail, and Fish Grade Trail.

For questions, email water@marinwater.org. We are available during normal business hours, Monday-Friday 8 a.m. to 5 p.m.

Click here to report watershed issues.

Click here to download a watershed map.

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