Welcome to Sugarloaf Ridge State Park
Sugarloaf Ridge State Park contains the headwaters of Sonoma Creek. It runs through gorge and canyon, across the meadow floor, beneath scenic rock outcroppings, and is surrounded by redwoods and ferns. With 47 family-sized campsites and 25 miles of hiking trails, it is the perfect place to spend time outdoors!
Note: Pets are permitted in the campground and picnic area and on paved roads in the main park area, but not on park trails or in the back-country regions and roads.
Current Park Conditions
Sugarloaf Ridge State Park is open every day from 6:00 a.m. to 10:00 p.m. above the kiosk. The Visitor Center is open from 9:00 a.m. to 5:00 p.m.
On the Conditions page, you can find the latest updates on trail status, special projects, weather conditions, and wildflower reports at Sugarloaf Ridge State Park. Stay informed about current trail accessibility, temporary closures due to maintenance or pile burns, seasonal weather impacts, and the latest wildflower sightings.
Notice: Pile burns at Sugarloaf Ridge State Park February-March. Visit the Park Conditions Page for pile burn updates and information on trail closures, conditions, and estimated reopening timelines to help plan your visit safely and responsibly.
Aviso: habrá quema de pilas en Sugarloaf Ridge State Park febrero-marzo. Visita la página “Park Conditions” para noticias acerca de la quema de pilas e información acerca de senderos cerrados y su estimada hora de abrir para ayudarte a planear tu visita seguara y responsablemente.
Photo courtesy of Melania Mahoney
HEADWATERS TO HEADWATERS 2025
A fundraiser for Sugarloaf Ridge State Park and Mayacamas hiking adventure, Saturday, April 12
Please note—tickets for both options are currently sold out, but a waitlist is open. Click the button below to learn more and join the waitlist.
Join our annual fundraiser—an unforgettable journey through the heart of Sonoma County’s most pristine and breathtaking landscapes. This event features a grand tour of the Mayacamas Mountains in the northern half of Sonoma Valley, followed by a delicious BBQ dinner.
Sugarloaf Ridge State Park is operated by Sonoma Ecology Center, a 501(c)(3) nonprofit organization. While Sugarloaf is a California State Park, it does not receive operational funding from the State. It is our visitors, donors, volunteers, and members who make it possible for us to keep Sugarloaf Ridge State Park open for the community to enjoy.
Calendar of Events
Camping
We have 44 campsites open, both reserveable in advance and first-come, first-served in our lovely creekside campground.
Read the Sonoma Ecology Center 2024 Impact Report!
Our parent organization, Sonoma Ecology Center, making great impacts in the areas of COMMUNITY, LAND, CLIMATE, WATER, and BIODIVERSITY in Sonoma Valley.
Camping at Sugarloaf
You can enjoy camping year-round at Sugarloaf with 47 family-friendly, alcohol-free camping spaces nestled in a large meadow and bordered by a year-round stream and a hillside forest.
Stargazing at Robert Ferguson Observatory
Completely dedicated to public viewing and education, the Robert Ferguson Observatory is the LARGEST in the western United States and it’s right here at Sugarloaf Ridge State Park.
Community-Operated Park
Sugarloaf Ridge State Park is operated by Sonoma Ecology Center and Team Sugarloaf. Learn more by visiting the Team Sugarloaf Page
The Ecology Blog
Learn about the many activities and impacts throughout Sonoma Valley of our lead organization, Sonoma Ecology Center.
Looking Ahead: Headwaters to Headwaters 2025
This April, over one hundred community members will set out on the trail together for Sonoma Ecology Center’s annual Headwaters to Headwaters fundraiser hike. Over the course of the day, […]
Sugarloaf Ridge State Park – Wildflower Update, February 17, 2025
Spring is arriving early at Sugarloaf, and the trails are beginning to bloom. While we may not have a super bloom, there is always something new to discover. Delicate blossoms, vibrant petals, and hidden gems are waiting along the trails for those who venture out.
Most wildflowers can be found along the trails, where you must hike in to see them up close. This week’s report comes from the Brushy Peaks, Gray Pine, and Meadow Trails, brought to you by Jim Webb. Come explore and see what’s in bloom!
Sugarloaf Ridge State Park-Wildflower Update, February 13, 2025
Hoary manzanita (Arctostaphylos canescens), photo courtesy of Jim Webb.By James Webb About James (Jim) Webb: Jim began volunteering with Sugarloaf Ridge State Park last February 2023 as a trail patrol […]
Introducing Emma Melendy, Educator
This January, Sonoma Ecology Center welcomed Emma Melendy to our Education Team. As a previous Enviroleader and SEC Environmental Ambassador, Emma brings her personal experiences with SEC’s educational programming to […]
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