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Welcome to Sugarloaf Ridge State Park

Hiking Galore

Enjoy over 25 miles of trails for every level of hiking ability

Stunning Beauty

Adventure and exploration the entire family will love

Headwaters to Sonoma Creek

Enjoy a stunning waterfall which flows 25 ft. high after winter rains!

Stay and Explore

We offer 47 family-sized campsites!

Welcome to Sugarloaf Ridge State Park


Sugarloaf State Park is open for hiking and camping.  All trails are open, except GOODSPEED TRAIL.  

El Parque Estatal Sugarloaf está abierto para senderismo y acampada. Todos los senderos están abiertos, excepto el SENDERO GOODSPEED.

Trail Status: Please check at the Kiosk or Visitor Center for updated trail conditions.
Estado de los senderos: Por favor pregunte dentro del centro de visitantes o en el quiosco acerca de las cerraduras o condiciones de los senderos.

CLOSED:  Goodspeed
CERRADO: Goodspeed


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!

Camping:  We have 44 campsites open, both reservable in advance and first-come, first-served in our lovely creekside campground.

Park Rx–Yoga Hike @ Sugarloaf Ridge State Park
Mar 9 @ 10:00 am – 12:30 pm

Enjoy your yoga experience in the beautiful setting of our park! Susan Topf’s Yoga Hike balances a mix of easy hiking and gentle yoga postures, breath work and guided meditation, no mat necessary. The route varies on weather conditions and group interest that typically covers 2-3 miles of varied terrain. All levels and ages welcome.

Tickets are $30 for general audiences and include parking if registered in advance online. Please wear weather-appropriate clothing to feel comfortable being in a natural setting and bring water (as needed). Meet outside the Visitor Center unless otherwise noted in confirmation email prior to the hike. Limited to 12 participants.

Sonoma County Resident? Free with a January 2024 Park Rx from a participating Sonoma County Medical Provider. Click here for Park Rx info.

Ease of access: we’re unable to determine ease of access as the route will be decided the day-of by the hike leader and other logistics (mud, small water crossings, slippery trails, etc).

For more events at Sugarloaf, visit our calendar.

Sugarloaf Volunteer Trail Crew @ Sugarloaf Ridge State Park
Mar 14 @ 9:00 am – 1:00 pm

Volunteers play a crucial role at keeping Sugarloaf Ridge State Park open and accessible to all! Help Sugarloaf with trail restoration work by coming to our every-other-Thursday Volunteer Trail Crew. Activities include bridge and step construction, installing signs, clearing, lifting, carrying, and hiking.

Bring gloves, hat, and water that you can carry hands-free (i.e. a backpack). Wear long pants, boots or sturdy shoes and sunscreen. Long sleeves are recommended as poison oak is present. We have tools and trained crew leaders with tasks for all. Minors must be accompanied by a responsible adult. We will provide tools, and if allowed, lunch.

If you are a current Sugarloaf volunteer, log onto Better Impact to sign up.
Not a Sugarloaf volunteer yet? RSVP to sugarloafvolunteer@sonomaecologycenter.org no later than the Sunday prior to the work day to ensure we have lunch for you.
First-time volunteers are welcomed and encouraged to formally join our volunteer program if they’d like to support us more frequently. Start here to become a volunteer.

ParkRx—Intermediate Hiking for Fitness @ Sugarloaf Ridge State Park
Mar 16 @ 9:00 am – 1:00 pm

UPDATE (Friday February 16, 3:30pm): The Intermediate Hiking for Fitness series will start on Saturday, March 16 instead of March 9.

If you have previously completed the Beginner Hiking for Fitness series, or can hike a little more than 4 miles with at least 1,000 ft of elevation, this series is for you! The program leaders will guide you on a series of weekly hikes with the challenge increasing each week. Leaders will have group discussions about gear, hydration, hiking poles, first aid and pacing, etc. The group’s final hike aims for Bald Mountain, where hikers can enjoy stunning vistas.

The following is a list of possible routes specifically selected for this hiking series:
1) Sat 3/16 – Waterfall loop, 2.7 miles, 750 ft elevation [meet @ main lot]
2) Sat 3/23 – Vista Trail loop, 3.4 miles, 830 ft elevation [meet @ White Barn]
3) Sat 3/30 –Goodspeed to Nattkemper bench, 3.8 miles, 1,240 ft elevation [meet @ Goodspeed lot]
4) Sat 4/6 – Hillside to Neptune table + Meadow, 4.4 miles, 970 ft elevation [meet @ White Barn]
5) Sat 4/13 – Hillside + Vista Trail loop, 3.6 miles, 1,070 ft elevation [meet @ White Barn]
6) Sat 4/20 – False Lake Meadow & Lake Ilsanjo loop in Trionne-Annadel SP, 6.1 miles, 670 ft elevation [meet @ Annadel’s Cobblestone Trailhead]
7) Sat 4/27 – Fern Lake + Orchard loop in SDC/Jack London SHP, 5.5 miles, 1,460 ft elevation [meet @ Walnut & North St inside SDC; park on Grove St]
8) Sat 5/4 – Bald Mtn summit (w/optional Headwaters detour, 5.8 miles), 5.1 miles, 1,670 ft elevation [meet @ White Barn]

Please note these routes are subject to change based on the group and weather. Wear appropriate footwear for rocky or slippery trails, and layers. Bring water, and if desired, a snack. The group will be limited to 35 participants.

The Hiking series costs $80 (plus a $10 parking fee per visit. Note that the Sugarloaf Annual Pass is $59 and valid at Sugarloaf and Jack London SHP), or free-of-cost for hikers with a January 2024 or newer Park Rx from a participating Sonoma County Medical Provider. Click here for ParkRx info. To sign up with a ParkRx, please email alma@sonomaecologycenter.org. Please have your Rx available at the time of sign-up, as the number of ParkRx tickets is limited and you will be asked to turn in a copy at the time of registration.

For more events at Sugarloaf, visit our calendar.

Reptile Hike @ Sugarloaf Ridge State Park
Mar 17 @ 11:00 am – 1:00 pm

March and April make for good reptilian-spotting months as ectotherms leave their burrows in search of food and mates. Join Galen and Rachel Freed in this easy 2-mile hike in search of snakes, lizards, and other wildlife. We’ll start off with a presentation inside the Robert Ferguson Observatory classroom and then hike Lower Bald and Creekside Trails, whose habitats is preferred by these species.

Meet at the White Barn parking lot. Tickets are $10-$15 sliding scale for general admission, $5 for youth (12-17 year olds), students, Sugarloaf members, Sugarloaf volunteers, and free for children under 12. Wear sun protection ad comfortable shoes, bring at least a quart of water, and if desired, a snack. Rains cancel. Parking fees apply.

Ease of access: The White Barn parking area has one van-accessible designated parking spot and one accessible porta-potty. There is a flat, paved 1/4-mile road from the parking area to the observatory. The observatory is wheelchair-accessible by a wooden ramp and deck. The Lower Bald Mountain Trail has two trailheads: one outside of the observatory, and one at the main parking lot. It is a single-track trail with sections of dirt, and some sections of gravel, with switchbacks, steps, and a cumulative elevation gain of 54ft. The Creekside Nature Trail is ADA-compliant from the main parking lot to the White Barn parking lot, about 0.48mi.

For more events at Sugarloaf, visit our calendar.

Wondrous Wildflower Walk @ Sugarloaf Ridge State Park
Mar 23 @ 10:00 am – 1:30 pm

UPDATE 2/28, 4:30 pm: The 3/2, 3/23, & 4/6 hikes are sold out.

Join Certified California Naturalist John Lynch on his  wondrous wildflower walks.

On 3/2, we’ll follow Pony Gate Trail’s grassy slope, into the Oak woodland and through a mixed evergreen forest, along Canyon Trail’s shady riparian corridor lined with redwoods, to the 25-foot dramatic plunge of Sonoma Creek and back to the our starting point at the Visitor Center.

Departing from the Visitor Center, the 3/23 route takes us on the Creekside and Hillside trails returning via Meadow.

On 4/6, from the White Barn, we’ll scout Hillside to Brushy Peaks turning around at the Neptune picnic table and back on Meadow Trail.

We’ll celebrate Earth Day on 4/21 on Vista Trail via Lower Bald Mtn (from the White Barn) and returning on Meadow Trail.

Wear hiking shoes, layers appropriate for weather, bring at least a quart of water, a camera, and wildflower guides if you have one. Tickets are $10-$15 sliding scale for general audiences, $5 for students, youth (12-17 year olds; must be accompanied by an adult), Sugarloaf members and volunteers, and free for children under 12. Parking fees apply. Heavy rain or wind cancels and will be announced by 9:00am the day of the hike.

Ease of access: The Pony Gate-Canyon loop is approximately 2 miles with an elevation of 595 ft. Both trails are single-track dirt trails with steps that descend into a canyon. There is a seasonal water crossing (creek bed) on Pony Gate without a bridge.

The Creekside-Hillside-Meadow loop is ADA-compliant for approximately 0.35mi. From there, Hillside is a single-track dirt trail for 0.1mi that widens into a 2-mile fire road loop with two 100-foot hills and a small stream crossing with a wooden plank for a bridge. Meadow is passable by strollers or wheelchair up to the bridge, about a mile in, but is not officially an ADA-compliant trail.

Hillside Trail is a single-track dirt trail for 0.1mi that widens into a 2-mile fire road loop with two 100-foot hills and a small stream crossing with a wooden plank for a bridge. Brushy Peaks Trail is a rugged single-track dirt trail with 650 feet of elevation and a short section of steps.

Lower Bald Mtn Trail is a single-track gravel and dirt trail with at times, rough terrain and steps. It connects to Bald Mtn Trail, a steep, paved fire road. Vista Trail is a single-track dirt trail with at least three stretches of steep steps and at least two small seasonal water crossings without a bridge. Gray Pine, the connecting trail between Vista and Meadow Trails, has a year-round stream crossing with a board for a bridge.

For more events at Sugarloaf, visit our calendar.

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Read the Sonoma Ecology Center 2023 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

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.

Robert Ferguson Observatory

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.

School Programs

Community-Operated Park

Sugarloaf Ridge State Park is operated by Sonoma Ecology Center and Team Sugarloaf. Learn more by visiting the Team Sugarloaf Page