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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 has reopened. Today, Tuesday, camping is available in The Group Camp. Regular camping will start on Wednesday. As of 11:00 am, Pony Gate and Canyon Trail is open and clear. Goodspeed Trail is closed. All other trails are open but not patrolled, so trail conditions are unknown. Please report any down trees or trail issues to the visitor center if you hike any of the other trails. Also, be advised to drive slowly as there may be some rocks on the road and be careful on the trails.

El Parque Estatal SugarLoaf ha reabierto. Hoy, martes, el camping está disponible en área para Grupo de Campamento. El camping regular comenzará el miércoles. A partir de las 11:00 de la mañana, los senderos del Pony Gate y Canyon está abierto y despejado. El Sendero de Goodspeed está cerrado. Todos los demás senderos están abiertos pero no patrullados, por lo que las condiciones del sendero son desconocidas. Por favor, informe cualquier árbol caído o problemas en el sendero al centro de visitantes si camina por cualquiera de los otros senderos. Además, tenga en cuenta que debe conducir lentamente ya que puede haber algunas rocas en el camino y tenga cuidado en los senderos.

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.

Sugarloaf Volunteer Trail Crew @ Sugarloaf Ridge State Park
Feb 22 @ 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.

Early Spring Wildflowers & Plant Uses @ Sugarloaf Ridge State Park
Feb 24 @ 10:00 am – 1:30 pm

UPDATE 2/15, 2:38PM: This hike has been postponed to Sat, 2/24, for the same time.

Join Certified CA Naturalist John Lynch and Sugarloaf staff Desi Harp on a 3 mile, 2.5 hour guided nature walk from creekside to hillside and back through the meadow. We will take our time with frequent stops to enjoy and identify the wildflowers, talk about the traditional uses of plants we encounter, and catch our breath.

Tickets are $15-$20 sliding scale for general audiences, $7.5 for youth (12-17 year olds) and students, Sugarloaf members, Sugarloaf volunteers, and free for children under 12. Meet at the Visitor Center. Wear appropriate clothing and footwear for two miles of leisurely walking and chatting over moderate and possibly muddy terrain. Bring a quarter of water, We invite you to bring a reusable drink container for your little ones to enjoy hot cocoa after the walk. Heavy rains cancel; parking fees apply.

Ease of access: The main parking lot has one van-designated parking spot and an accessible vault toilet. There is a paved road from the main lot to the Visitor Center. The Creekside Nature Trail is ADA-compliant compliant for 0.35 miles and then turns into a single-track trail that crosses a narrow cement bridge. Hillside Trail is a fire road with two hills and a water crossing with a board. Meadow is also a compacted gravel fire road. From its trail head to the bridge, although not ADA-compliant, it is a fairly flat trail passable by power chair and stroller.

For more events at Sugarloaf, visit our calendar.

Mushroom Hike at Sugarloaf (Sold Out) @ Sugarloaf Ridge State Park
Feb 24 @ 10:00 am – 1:00 pm

Explore the hidden world beneath our feet on this mushroom hike led by local mycologist George Riner. We’ll observe their growth, learn to identify different species by key traits, be mesmerized by the display of colors, shapes, textures, and discuss these remarkable organisms’ ecological roles, culinary delights, and even a touch of folklore.

Be prepared for two miles of leisurely walking and chatting over moderate and possibly muddy terrain. Please be aware this is not a foray; collection is permitted for this activity through a CA State Parks Scientific Research and Collecting permit. Tickets are $10-$15 sliding scale for the general public, $5 for students, youth, Sugarloaf members, Sugarloaf volunteers, and free for children under 12. You must have a ticket to attend. Meet outside the Visitor Center ten minutes prior to the event start time. Please wear appropriate clothing and footwear, bring water, and if you have them, mushroom identifying guides. We invite you to bring a reusable drink container so your little ones can enjoy hot cocoa after the walk, if desired. Heavy rains cancel; parking fees apply.

Ease of access: we’re unable to determine the ease of access for this hike as the route will be chosen day-of by the leader dependent on weather conditions and other logistics.

For more events at Sugarloaf, visit our calendar.

Sugarloaf New Volunteer Orientation & Social | Orientación para voluntarios nuevos @ Robert Ferguson Observatory (inside Sugarloaf Ridge State Park)
Feb 24 @ 11:00 am – 3:00 pm

[En español abajo]

Enjoy the beauty of this special place in Sonoma Valley while joining our wonderful community of volunteers. Volunteer with Team Sugarloaf and become an integral piece in keeping Sugarloaf Ridge State Park operating. Join us for an orientation on February 24, 2024, from 11:00am-2:00pm to learn about the history of Sugarloaf, how Sonoma Ecology Center operates the park, and what volunteer opportunities we have. The orientation will take place in the Robert Ferguson Observatory classroom.

Volunteers play a vital role at Sugarloaf. We have a host of volunteer opportunities to restore and maintain this natural treasure and to help to keep Sugarloaf open to the public. Initial training is provided, with periodic docent enrichment events. We need volunteers to:

– Become docents at the Visitor Center
– Direct visitors at the entrance kiosk
– Assist with data entry
– Aid project research and grant-writing
– Work on trail and park maintenance projects
– Facilitate special events and parking
– Spanish/English literacy and conversational fluency is a plus

View more volunteer opportunities and specifics in our website. Experience is not necessary but welcomed, as well as a willingness to learn and the desire to share that knowledge with our visitors. We ask for a minimum of 4 hours per month of volunteer service. Please create a Better Impact account to start the process. Bring a notepad and pen, a reusable drink container for warm beverages, dress in layers, and if desired, a snack.

Attending a Volunteer Orientation is required to become a volunteer at Sugarloaf. English is needed for all positions. Spanish-English literacy or fluency is a plus for all positions. Please share this opportunity!

Ease of access: the Robert Ferguson Observatory has an ADA-compliant wooden deck/ramp to access the classroom. There is one van-designated parking spot and although not ADA or van designated, there is lots more parking adjacent to the Observatory/group camp. The group camp is a large area to the left of the Robert Ferguson Observatory. The ground is a mix of soil and woodchips navigable on a power chair. There is an accessible porta-potty and a water spigot on site. The picnic tables and benches are not ADA-compliant but are available.


For more events at Sugarloaf, visit our calendar.

ESPAÑOL: Disfruta de la belleza de este lugar especial en el Valle de Sonoma mientras te unes a una maravillosa comunidad de voluntarios. Ven a ser voluntario con Team Sugarloaf y forma una parte integral en la operación del Parque Estatal Sugarloaf Ridge. Acompáñanos en una orientación para voluntarios nuevos el sábado 24 de febrero, de las 11:00am a las 2:00pm para aprender acerca de la historia de Sugarloaf, cómo Sonoma Ecology Center opera el parque, y oportunidades de voluntariado. La orientación será dentro aula del Observatorio Robert Ferguson.

Voluntarios desempeñan un rol vital en Sugarloaf. Tenemos muchas oportunidades para restaurar y mantener este tesoro natural y para ayudar a mantener Sugarloaf abierto al público. Proveemos capacitación inicial, con oportunidades periódicas de aprendizaje. Necesitamos voluntarios para:
-docentes en el centro de visitantes
-dirigir visitantes en el quiosco
-ayuda con entrada de datos
–ayuda con proyectos investigativos y propuestas para conseguir fondos
-trabajar en proyectos de mantenimiento en los senderos y alrededor del parque
-facilitar eventos especiales/estacionamiento
-continuar creciendo nuestros programas bilingües, especialmente en español e inglés

Encuentra más oportunidades voluntarias y especificaciones en nuestro sitio web. Experiencia no es necesaria pero bienvenida, al igual que la disposición de aprender y el deseo de impartir estos conocimientos con visitantes. Pedimos que voluntarios por favor estén disponibles un mínimo de 4 horas por mes. Por favor empieza el proceso creando un perfil en Better Impact. Ven abrigado, trae una libreta, un lapicero, tu contenedor de bebidas reusable, y si deseas, un bocadillo.

Se requiere atender la orientación de voluntarios para ser un voluntario en Sugarloaf. Todas las posiciones necesitan dominio del inglés; se valorará experiencia de candidatos bilingües en español e inglés. ¡Por favor comparte esta oportunidad!

Facilidad de acceso: Acceso al aula del Observatorio Robert Ferguson es mediante una rampa de madera que oficialmente cumple con los requerimientos de la Ley para Estadounidenses con Discapacidades (ADA). Hay un espacio designado para estacionar un vehículo como una miniván o más grande, y aunque el resto del área de estacionamiento no es designada como estacionamiento accesible, puede ser utilizada como accesible. El área de asentamiento dentro del aula principal del observatorio está compuesto de sillas que fácilmente pueden moverse para acomodar ingreso accesible. Hay baños disponibles dentro del edificio, incluyendo un cubículo accesible en cada baño. El área de acampar en grupo es un área grande fuera del observatorio. El suelo es una combinación de tierra y astillas de madera, que pueden ser navegado en una silla de ruedas con motor. Hay un baño portátil accesible y una llave de agua en el sitio. Las mesas de picnic no son accesibles pero están disponibles.



Para ver más eventos en Sugarloaf, visita nuestro calendario

Habitat Hike: Chaparral @ Sugarloaf Ridge State Park
Feb 25 @ 9:00 am – 11:00 am

What is a habitat? Join CA Naturalist and Sugarloaf docent Marie Kay Hansen through the featured habitat, chaparral, to explore all it has to offer. Learn about the largest native plant community flora in California, characterized by rugged terrain and adaptive flora, during this 2-3 mile hike along Goodspeed Trail up to Pierson Rd and possibly past until the unnamed creek crossing. This hike is the first in our four-part ‘Habitats of Sugarloaf’ hike series. Other hikes will explore the oak woodland, meadow and redwood forest habitats.

Meet at the Goodspeed parking lot. Tickets are $10 for general admission, $5 for youth (12-17 year olds), students, Sugarloaf members, Sugarloaf volunteers, and free for children under 12. Wear layers, appropriate footwear for muddy and/or slippery trails, bring at least a quart of water, sun protection, and if desired, a snack. Heavy rain cancels. Parking fees apply.

Ease of access: Goodspeed Trail is an out-and-back, single-track dirt trail. The first several hundred feet is a rough foot trail down to Sonoma Creek. The next several hundred feet (including wooden bridges with handrails over two creeks) is mostly flat. The remainder of the route is mostly steep with steps and a rugged climb through serpentine chaparral.

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