Valley of the Moon Natural History Association

The Valley of the Moon Natural History Association is an important partner to three California State Parks in the Sonoma Valley: Annadel, Sugarloaf Ridge, and Jack London State Historic Park. Their all-volunteer non-profit organization funds special projects, educational exhibits, maps, and publications for the parks.  They support horseback and bicycle patrol groups and sponsor yearly docent training classes.


Membership dues, special events, donations and sales revenue at Sugarloaf Ridge and Jack London visitor centers also provide monies for a motorized cart service for the physically challenged and garden care at the Jack London Cottage.


Recent projects include the Snark exhibit at the House of Happy Walls, the building campaign for Annadel’s Visitor Center, maps and signage for all three parks, and trail maintenance support.  They are proud of their thirty-four year contribution to these wonderlands made up of thousands of acres in the heart of the Sonoma Valley.  


For more information,  see their website,,  or write to:

Valley of the Moon Natural History Association
2400 London Ranch Road
Glen Ellen, CA 95442


California State Parks has a valuable relationship with more than 80 cooperating associations authorized pursuant to Public Resource Code 513. These non-profit charitable organizations are dedicated to enhancing the educational and interpretive programs in California State Parks. Associations are related to, but independent of the state parks they serve.

Many associations have websites. California State Parks encourages you to visit these websites, however do not guarantee the content, timeliness or accuracy of the materials on these sites.