Marin Water Road and Trail Management Plan Update

Marin Water has officially begun environmental review of its update to the Road and Trail Management Plan and 27 miles of trails are under consideration for bike access.

Check out the interactive map here.

Submit a written comment to the email below:

Email: rtmp@marinwater.org
Subject: RE: Mount Tamalpais Road and Trail Management Plan Update Public Comment

Comments will be accepted through noon on September 28, 2026.

Your voice matters. We encourage you to express support for Marin Water fully evaluating how thoughtful trail planning can improve environmental conditions while providing sustainable, well-managed bike access.

A modern trail system can help concentrate recreation on appropriate routes, address unsustainable trail conditions, support restoration and stewardship, and create better experiences for everyone who enjoys the watershed.

Strong public support for these goals is essential to moving this important work forward.

Thank you for speaking up for a healthier watershed and a more sustainable trail system.

PAST EVENTS

Marin Water’s public scoping meeting

Thursday, September 10, 2026 | 4:00–7:00 p.m.

The meeting is an opportunity to learn more about the process and provide input on the scope of the Environmental Impact Report (EIR).

Community workshop and open house – May 30, 9:30 a.m.-1 p.m.
Community members are invited to join Marin Water staff for a community workshop and open house at Sky Oaks Headquarters on the RTMP update to share feedback on key recommendations and trail scenarios.

June 18, 2026, 5pm  – Watershed Committee Meeting: RTMP Planning Update
Update on RTMP process, community engagement and planning scenarios

Summer/Fall 2026 – Public draft of updated RTMP available; Environmental Review

Past Events:

Site Walk #3 – Saturday, April 11, 2026, 9 a.m. – 12 p.m.
Meet-up location: The third site walk is scheduled for Saturday, April 11, 2026, from 9 a.m. – 12 p.m., and the initial meeting location is at Sky Oaks Headquarters. The event will begin with a series of “lightening talks” (concise, engaging presentations), followed by short site walks. Additional details and agenda coming soon.

March 19, 2026 – Watershed Committee Meeting: RTMP Planning Update

• Review plan elements and scenarios  

Site Walk #1 – Saturday, January 31, 2026, 9 a.m. – 12 p.m.
Meet-up location: Mt. Tam Mountain Theater Overflow lot (East at Rock-Lagunitas Fire Road, E Ridgecrest Blvd, Mill Valley, CA 94941)

Site Walk # 2 – February 27th 10am- 12:30pm

Meet up location: Lagunitas Overflow Parking Area near Sky Oaks Road and Filter Plant Road

November 9, 10, 2025 – Marin Water Community Open House

December 18, 2025 – Watershed Committee Meeting: RTMP Planning Update

• Review social trail priorities and opportunities  
• Provide guidance on bike access scenarios and standards
• Considerations for visitor engagement and stewardship