How is our Valley doing? We monitor, analyse, map, and report on broad measures of ecological health in Sonoma Valley.

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We provide educational and outdoor programs for thousands of students in Sonoma Valley.

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We foster and maintain publicly accessible open spaces, including Sugarloaf Ridge State Park, Van Hoosear Wildflower Preserve and the Sonoma Overlook Trail.

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Since 1993, we’ve worked side by side with landowners and volunteers on projects that restore, protect, and improve our natural heritage.

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Beautiful. Sustainable. Sonoma.

Since 1990, we’ve worked to increase appreciation and stewardship of Sonoma Valley’s natural heritage and create measurable benefits in areas of land, water, climate change and biodiversity.

Upcoming Events

Spring Break Day Camp @ Sugarloaf Ridge State Park
Mar 23 @ 9:00 am – 3:00 pm

Do you want to get the kids out of the house over Spring Break for some fresh air? We’ve got you covered at Sugarloaf Ridge State Park with our upcoming Day Camp. Join the Sonoma Ecology Center education staff for a day of fun, learning and outdoor activity. Based on our summer Creek Camp, we plan on having a nature hike, viewing the sun through solar scopes, and learning about the creatures of the park. And we will end the day with s’mores and hot chocolate around a roaring campfire. Camp will be based out of the Visitors Center. Time: 9 a.m. to 3 p.m. Cost: $35, or $25 for Sonoma Ecology Center members, Sugarloaf Park pass holders or for a second child from the same family. Ages 7-12. See link  to sign up


Trail Clearing & Construction Day @ Sugarloaf Ridge State Park
Mar 23 @ 9:00 am – 1:00 pm

Help us keep our trails clear of brush and free of mud and rocks and assiste with construction and maintenance projects such as painting and building repair.  Meet at the White Barn at 9:00.   Tools provided, no experience needed.  And lunch included!
Volunteers like you make the difference at Sugarloaf.
To RSVP and if you have questions email

Yoga Hike @ Sugarloaf Ridge State Park
Mar 25 @ 10:00 am – 12:30 pm

Susan Topf’s Yoga Hike balances a mix of hiking and gentle yoga postures, breath work and guided meditation. No mat necessary. Please wear weather appropriate clothing to feel comfortable being in a natural setting. For those familiar with the park, we will most likely be hiking the 2.5 mile Meadow / Hillside Loop with yoga stops in secluded glades, hilltop vistas and tranquil creekside settings. Route varies on weather conditions and group interest. Cost is $20 including parking if registered online. All levels and ages welcome.
Tickets here:

RFO Solar Viewing @ Robert Ferguson Observatory
Mar 25 @ 11:00 am – 3:00 pm

-Solar Observing:  Time: 11AM – 3PM.  Come and view our closest star and learn about sunspots, prominences, flares and more. We observe with both visible light and radio telescopes.  No Charge.
For more info please visit Robert Ferguson Observatory Website:

RFO Public Star Party @ Robert Ferguson Observatory
Mar 25 @ 8:00 pm – Mar 26 @ 12:00 am

-Presentations on astronomical topics are given in the classroom throughout the course of the evening. Starting at dusk, the Observatory’s three main telescopes are open for your viewing. Docents set up additional telescopes in front of the building. Friendly and knowledgeable docents are available to answer your questions.
For more info please visit Robert Ferguson Observatory Website: in the daytime

Featured Projects

Click on the image for an interactive map of Sonoma Valley

Visit our partner websites – Sugarloaf Ridge State Park and Sonoma Garden Park

Sugarloaf Ridge State ParkSonoma Garden Park

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The Ecology Blog: What’s Happening in Sonoma Valley

Changes in the Biochar Landscape

Changes in the Biochar Landscape

As word about biochar grows – thanks in large part to the efforts of our own Sonoma Biochar Initiative – coordination grows among biochar’s many advocates, who note how this super-charcoal can help California save water while reducing greenhouse gas emissions. Last...

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With Water Comes Watershed Education

With Water Comes Watershed Education

The rains give us our best opportunities for teaching Sonoma Valley kids about watersheds. Which is why Sonoma Ecology Center’s Watershed Education Programs are in full swing right now. Our in-house educators, Holland Gistelli and Tony Passantino, are busy as ever...

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The Path Forward

The Path Forward

Environmentalism should not be a partisan issue. Healthy land, clean air and water – these things benefit everyone. And yet, amid today’s extreme political polarization, there is a fear that our environment is in the crosshairs – and this fear has many in our...

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VIDEO: Sonoma Creek Falls Is Raging

VIDEO: Sonoma Creek Falls Is Raging

Thanks to the recent rains, Sonoma Creek Falls is currently putting on quite a show (see video below). This beautiful cascade in Sugarloaf Ridge State Park, at the headwaters of Sonoma Creek, is easy to reach and always rushing after winter rains. To get there, take...

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