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.

We’re excited to celebrate the 50th year of Sugarloaf Ridge State Park, the 25th year of Sonoma Garden Park, a more inclusive Education Department, and an expanded Restoration Department.

See Our Special Sugarloaf Anniversary Memberships


Note to upper Sonoma Creek land owners: We are seeking input for a steelhead habitat project. Please help out by taking this brief survey.

Upcoming Events

Caminata del hongo @ Sugarloaf Ridge State Park
Feb 16 @ 10:00 am – 11:30 am

Caminata del hongo

No es una planta, no es un animal … ¡es un hongo! Venga a descubrir el extraño y maravilloso mundo de los hongos en Sugarloaf con un guía experimentado. 

Nos reuniremos en el centro de visitantes. Venta de boletos (https://www.brownpapertickets.com/event/4058050) es $5 para adultos, gratis para niños; el estacionamiento es $8 por vehículo. Habrá chocolate caliente para los niños después de la caminata. Este evento es bilingüe.

Si tiene alguna pregunta contacte a Alma en alma@sonomaecologycenter.org o llame al (707) 833-5712.

Mushroom Walk

It’s not a plant, not an animal… it’s a mushroom! Come discover the weird and wonderful fungi at Sugarloaf with an experienced guide.

Meet at visitor center. Tickets (https://www.brownpapertickets.com/event/4058050) are $5 for adults and free for children; parking is $8 per vehicle. There is hot cocoa for children after the walk. This event is bilingual.

If you have any questions call (707) 833-5712 or contact Alma at alma@sonomaecologycenter.org

Presidents’ Day (regional holiday)
Feb 18 all-day

Public holiday in: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, District of Columbia, Florida, Hawaii, Idaho, Illinois, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New York, North Dakota, Northern Mariana Islands, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wyoming

Family Hike @ Sugarloaf Ridge State Park
Feb 18 @ 10:00 am – 12:00 pm

Come to the park for a peaceful hike through the woods, join our Docent’s for this fun family hike that is good for all ages. During this 2 miles hike with a 400 foot vertical, you will learn about Sugarloaf Park and its plants, animals, and history. Weather permitting, the hike will begin and end at the Visitors Center. No RSVP needed, and no charge for the hike. Parking fees apply.

Edible Plants Walk @ Sugarloaf Ridge State Park
Feb 23 @ 9:30 am – 12:00 pm

Join Mary Good on a hike exploring the Medicinal and Edible plants of the park. Weaving in natural history, ethnobotany, herbalism and folktales, this walk will open your senses, as well as your curiosity to the abundance of plantlore in Sonoma County. 9:30 AM to 12 PM. Be prepared for a 2 to 3 mile walk with a 300 foot climb. Meet at the visitors center. $10.00 per adult, 18 and under free. Parking fees still apply. Edible plant information is for educational purposes only. Foraging is illegal in CA State Parks.

Purchase tickets here: https://www.brownpapertickets.com/event/4029785


Nathanson Stewards Volunteer Clean-up @ Nathanson Creek Preserve Native Garden
Feb 23 @ 9:30 am – 12:30 pm

On the fourth Saturday of every month, the Nathanson Stewards meet at the corner of East MacArthur and Second Street East, put on their gloves, and have a fun and productive morning tending the native garden located there.

This event is guided by trained restoration technicians from Sonoma Ecology Center, with a focus on native gardening and landscaping. The subject matter will vary with the seasons, and our technicians will demonstrate proper techniques for caring for the different native plants located within the Nathanson garden. Volunteers are asked to bring sunscreen or a hat, bottled water, a sack lunch and work gloves, and to wear closed-toed shoes. All ages are welcome, but children must be accompanied by an adult.

We’ll meet at the Nathanson Creek Preserve Garden located on the corner of East MacArthur Street and Second Street East in Sonoma. Activities may include:

  • Weeding
  • Trash pick-up
  • Getting to know your neighbors
  • Learning about native plants
  • Sharing a sack lunch
  • Connecting with nature at your local park

For questions or to express interest, please email nathansonstewards@gmail.com or patrick@sonomaecologycenter.org.



Visit our partner websites:

Sugarloaf Ridge SP, Sonoma Garden Park & Sustainable Sonoma

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

SEC Seeks Input on Steelhead Habitat Project

SEC Seeks Input on Steelhead Habitat Project

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