The landscape of our community has changed. Now is the time to harness our strength and spirit, together. We will be with you every step of the way, to rebuild a community that is more resilient, healthy and thriving.


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


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


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


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

As 2018 began, Sonoma Valley faced a year of challenges — of rebuilding, rebirth and renewal. Now the year is drawing to a close, and we’re glad to take a moment and reflect on all that we’ve accomplished with the help of friends, neighbors, volunteers and donors. We’re also looking ahead to the challenges and opportunities of 2019 — including erosion, smarter and more resilient rebuilding and landscaping, and the future of SDC. With your support, we’ll get it done, and much more. Let’s move our community forward, together.


Fire Recovery Tips & Info  ///  Donate

Upcoming Events

CANCELED – Keen Fire Recovery Outing @ Keen Property
Nov 18 @ 9:00 am – 12:00 pm


Protected in 2002, the Keen property is one of Sonoma Valley’s more unique and picturesque conservation easements. It protects ancient lava flows that form walls and rooms, that in turn frame elegant displays of native plants and offer stunning portal views to the surrounding Mayacamas Mountains. Though the creeks are still dry, the fall colors are flowing throughout the property that contains the headwaters of Agua Caliente Creek. The October 2017 fires also heavily effected this property. We invite you to come see the land rebound, assessing burned trees and learning how to interpret fire-affected landscapes.

This outing is for experienced hikers only, with difficult to moderate hiking over uneven, steep terrain with no trail. We may pass through brushy areas, with possible exposure to ticks or poison oak. (Hikers will meet at the Sonoma Police Department building at 175 1st Street West, Sonoma.) Bring appropriate clothing including long pants and sturdy footwear, a hat or sunscreen, and plenty of water. There is no charge for this outing, as it is made possible by Sonoma County Ag + Open Space and the voters of Sonoma County who fund the districts work with a quarter cent sales tax.

REGISTER TODAY! Reservations are required online no later than 5 p.m. Friday, Nov. 16. Limited spots are available for this rare opportunity to hike one of the gems of Sonoma Valley. This outing will fill fast!

Questions? Please contact Tony Passantino at tony@sonomaecologycenter.org or (707) 996-0712, ext. 108.

Sugarloaf Thanksgiving Break Day Camp @ Sugarloaf Ridge State Park
Nov 20 @ 9:00 am – 3:00 pm

Need some extra time to finish up cooking for the big day? Or just get the kids out of the house over Thanksgiving break? We’ve got you covered at Sugarloaf Ridge State Park with our upcoming Day Camp. Join the Sugarloaf Staff for a day of fun, learning and outdoor activity. Based on our summer Creek Camp, we plan on having a nature hike and learning about the creatures of the park. And we will end the day with s’mores and hot chocolate. The camp will be based out of the Visitors Center. Time: 9 a.m. to 3 p.m. Cost: $40, or $20 for Sugarloaf members or for a second child from the same family. For ages 7 to 12.

Registration: https://www.brownpapertickets.com/event/3828256

Thanksgiving Day
Nov 22 all-day
Sugarloaf Trail Crew @ Sugarloaf Ridge State Park
Nov 22 @ 9:00 am – 1:00 pm

Help Sugarloaf with trail restoration work. Work includes bridge and step construction, installing signs, clearing, lifting, carrying and hiking. Bring gloves, hat, and water that you can carry hands-free (i.e. bring a backpack).Wear long pants, boots or sturdy shoes and sunscreen. Poison oak is present, so long sleeves are suggested. We have tools and trained crew leaders with tasks for all. Those under 18 years old must be accompanied by a responsible adult. We will provide tools, food and beverages. If you are a current State Parks volunteer, signup in vicnet. If you are an SEC volunteer, sign up here: http://www.signupgenius.com/go/20f0e4aaca62ca3ff2-sugarloaf1

Black Friday
Nov 23 all-day

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

Sugarloaf Ridge State Park Sonoma Garden ParkSustainable Sonoma

Project Story Map

Click on the image below for an interactive map showing our projects in Sonoma Valley.

Sign the SDC Petition

Sonoma Developmental Center is preparing for final closure after 127 years of operation. Please sign the petition urging Gov. Jerry Brown to protect this large swath of crucial open space located in the heart of Sonoma Valley.

Read our 2018 Impact Report

Click on the image for a pdf version.


Smarter Landscaping

Click on the image below for a pdf version of our brochure on fire smart, water wise and wildlife friendly landscaping.

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The Ecology Blog: What’s Happening in Sonoma Valley

Fogbow in the Hills

Fogbow in the Hills

When there's fog in the Valley, the boundary where sun and fog meet often creates interesting tricks of light, like this fogbow seen up in the hills on Thursday morning. Fogbows are formed by the same light-scattering process as rainbows. But fog is made up of much...

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New Rains, New Landscapes this October

New Rains, New Landscapes this October

This October is shaping up to be much nicer than last year’s! The month announced itself with a strong, warm rainstorm, bringing an unexpected 1.6 inches of rain to Sonoma Valley. That was enough to activate the seed bank, causing grasses to pop up and reducing...

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Honoring the Heritage Maple of Sugarloaf

Honoring the Heritage Maple of Sugarloaf

Hundreds of years ago, a bigleaf maple sprouted on the banks of Sonoma Creek in what is now Sugarloaf Ridge State Park. Today, as this magnificent Heritage Maple enters its twilight years, we are inviting the public to join us for an informative walk, a fascinating...

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