North Sonoma Mountain Regional Park & Open Space Preserve Master Plan

What & Why?

Regional Parks has worked with several public agency partners to make a 4.5 mile trail connection between Jack London State Historic Park and the trailhead at North Sonoma Mountain Park & Preserve.

An Initial Study and Mitigated Negative Declaration for the North Sonoma Mountain Ridge Trail Project, entry road, and staging area was approved by the Sonoma County Agricultural Preservation and Open Space District Board of Directors in March 2008, in compliance with the California Environmental Quality Act (CEQA). Project construction was completed in December of 2014 and the Park & Preserve opened to the public in February 2015.

What's Next?

To fully realize the possibilities of preserve development, Regional Parks is in the beginning phase of preparing a Master Plan for the Park & Preserve, including the top of the mountain. The process will study additional passive recreational opportunities for the public to enjoy in the Park & Preserve and how to best protect the unique and sensitive environment. Community workshops are being held to solicit ideas for Park & Preserve amenities and trail alignments.

Public meeting dates and other planning information will be shared on this website. To get the latest news, please  Sign up for Planning Updates.

For more information, please contact Project Manager Karen Davis-Brown, by phone (707) 565-2041, or by email at

Contact Information

Karen Davis-Brown, Planner II

Planning Division

Regional Parks
County of Sonoma
Business Hours
Monday – Thursday
7:00 AM – 4:30 PM
Contact us by Phone

Sign up for Planning Updates

North Sonoma Mountain Expansion Map

North Sonoma Mountain Expansion map
Download the Map
(PDF: 181 kB)

Office Location

Sonoma County Regional Parks
2300 County Center Drive
Suite 120A
Santa Rosa, CA 95403

Google Maps™ Directions
511 Public Transit Directions