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The Valley of the Moon Observatory Association (VMOA) are volunteer amateur and professional astronomers plus a small supporting staff organized as a nonprofit association to provide educational programs about science and astronomy for students, the public, and in support of educators.

The VMOA is responsible for the construction, maintenance and utilization of the Robert Ferguson Observatory and functions as a nonprofit organization under the auspices of the California State Parks System, and in cooperation with our local state parks.

Sugarloaf Ridge State Park

“Team Sugarloaf” operates Sugarloaf Ridge, including the campground. Five nonprofit organizations formed a unique partnership that has worked tirelessly to keep our park open.  Partners are: Sonoma Ecology Center; United Camps, Conferences and Retreats; Valley of the Moon Natural History Association; Sonoma County Trails Council; and Valley of the Moon Observatory Association.

With expertise in campground operations, ecological restoration, astronomy, trails management, and volunteer recruiting and training, Team Sugarloaf is creating new opportunities for Sugarloaf Ridge and its visitors.  Visit sugarloafpark.org for more information.

Come to stargaze and camp at Sugarloaf Ridge!

Contact us:
[email protected]
or via mail at

P.O. Box 898
Glen Ellen, CA 95442

View our 2020-2021 Strategic Plans and Important Links here.

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