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Coming Events

(Observatory is open to the public
ONLY for scheduled events).

Star Party

Saturday, March 17

Solar Viewing 11am
Star Party 8pm


Introduction to Astronomy

April 9, 7:30pm

The first class of a new 4-part series on the fundamentals of astronomy, with observing after class. Limited to 30 guests. For tickets and more information, visit
Brown Paper Tickets.

What's Up

Thursday, Apr. 19, 8pm

What's Up is a limited-ticket event. This session will focus galaxies such as the Whirlpool, the Pinwheel, and even the Hamburger. For tickets and more information, visit Brown Paper Tickets.

New Docent Training

Begins March 7, 6:30 pm

Join us to learn how to operate the telescopes and learn more about astronomy. See our Volunteer page for more information and to sign up.

Give us your Feedback!

Fill out our Star Party Visitor Survey
and enter to win a
Private Event for your group!


Want to help us keep our doors open?


RFO at night

Above: The Observatory at night. Photo by Mark Hillestad
Top right photo of Refractor Telescope by Jerry Telfer


Rent an

Yes, you can!
Treat your family, friends,
or group of up to 50 people
to a night with the stars!


Weather Forecast

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Click on chart for detailed explanation.

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!