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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 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 at times by redwoods and ferns. With 47 family sized campsites and 25 miles of hiking trails, it is the perfect place to spend time outdoors with your family!


Tuesday – October 26: Park Reopened.

Park is reopened Tuesday, October 26. Trails are muddy. Please only park in designated parking area.. You can check current park conditions here. 

To check on the weather at the park, please to go our weather page. We have four weather stations in the park, including a rain gauges at Bald Mt. and the Visitor Center.

Camping:  We have 44 campsites open, both reservable and first-come, first-serve in our lovely creekside campground.  And our Glamping sites opened April 1st – reservations available and booking fast!  For first-come-first-served sites call at 10 am.  Call ahead, these sites fill fast.

Social Distancing and Face Covering Information

Park visitors must comply with social distancing, hygiene, and face-covering requirements:

  • Stay at least 6 feet from others who are not part of your household.
  • Carry a face covering at all times. Coverings must be worn outdoors when you cannot stay 6 feet from others, such as when passing others on a trail.

  • Do not visit a park if you have any symptoms of Covid-19: fever, cough, sore throat, shortness of breath, unusual headaches, severe fatigue, chills, gastrointestinal symptoms, and lost sense of smell or taste.
  • Do not use group facilities.
  • Do not use drinking fountains. Bring your own water.
  • Pack out your litter to reduce the amount of trash parks staff and visitors may come into contact with. 
  • Cover coughs or sneezes with a tissue and pack out your tissue for disposal at home.


When parking, please observe social distancing protocols. If the park becomes too crowded, we may temporarily close access. Please come early or later in the day if you want to be sure of entry.


Events are back!  Please see our calendar below for our socially distanced, COVID safe events.   

Additional Information

For more information about Sonoma County’s shelter-in-place health order and other Covid-19 emergency resources, visit SoCoEmergency.org.


Sugarloaf Trail Crew @ Sugarloaf Ridge State Park
Oct 28 @ 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. Minors must be accompanied by a responsible adult. We will provide tools, and if allowed, lunch.

If you are a current State Parks volunteer, signup in Volgistics.

Otherwise, sign up here.

Sugarloaf Woodlands Comes Home to Your Garden @ Sugarloaf Ridge State Park
Oct 30 @ 10:00 am – 12:00 pm

Observe native California plants at Sugarloaf Ridge State Park. Learn how they can be used in your garden for beauty and interest. Join Nurseryman and Park Docent Bruce Hope in a riparian and chaparral  exploration at Sugarloaf. Our route will be cover at least a mile with a few hills. The numerous stops will give us a chance to discuss plant ecosystems, uses in the garden, propagation and plant care adapting wild plants to your garden.
Tickets are $10 for adults and free for minors. We’ll meet at the Goodspeed parking lot. Bring lots of water, sun protection, and wear good shoes for rocky and uneven trails. We will observe County Health orders including mask-wearing and physical distancing. Parking fees apply.

RFO Public Star Party @ Robert Ferguson Observatory
Nov 6 @ 7:00 pm – 10:00 pm

The Robert Ferguson Observatory (RFO) is open to the public at least once a month, usually on a Saturday near the time of the New Moon.

This part star party/part Night Sky Trails is a hybrid version of these two events. While our dome and west wing telescopes will remain closed, we will allow small groups in our east wing to view images from our RC20, research-grade telescope. Sky tour docents will be stationed outside to give guests laser guided tours of the constellations. This is primarily an outdoor event. Only part of the observatory will be open.

Ticket cost is $10.00 per adult, $5 for students and seniors 60+, and children under 12 are FREE.  (Note: while children tickets are free, they are still required.)(Plus State Park parking fee of $10.00 per vehicle.) You MUST have a ticket to attend this event.  Attendance is limited and, while remaining tickets will be sold at the door, they will be subject to availability.

COVID-19 Update: Based on direction from Sonoma County, RFO is requiring guests to wear face masks at all events, regardless of their vaccination status.  And, of course, if you are not feeling well or have a fever, please stay home.


  1. Map and Directions
  2. When to arrive: We keep the observatory open as long as there are visitors, but you must arrive within 3 hours after start time to ensure that we remain open for you. Summer Star Parties begin with tours and presentations until it’s dark enough for observing.
  3. Bring warm clothing, even in summer—observing is done outdoors.
  4. There is a short walk from the parking area to the Observatory and you may wish to bring a small flashlight.
  5. White Light: No white lights should be used after dark; the observatory is a red-light-only area to protect everyone’s night vision. We will supply red cellophane to cover flashlights. Please note:
    ◦ Bring a SMALL flashlight (large camp lanterns, light sticks, etc., cannot be adequately covered by red cellophane).
    ◦ Cell phones or cell-phone flashlights are acceptable but must be covered in red cellophane. (No cell service at the observatory).
    ◦ Some head lamps are difficult to cover with red cellophane. Once covered, head lamps should be worn around the neck or used pointing down as they are usually very bright at eye level.
    ◦ Red flashlights are available for $5 at the observatory.
  6. Alcohol is prohibited on Observatory grounds.
  7. The Observatory is not open to the public except for scheduled events.

For current conditions call the observatory at (707)833-6979.
RFO is operated by the Valley of the Moon Observatory Association, a 501(3)(c) nonprofit organization, and all of the proceeds will go towards maintaining this beloved Sonoma county institution. For more info please visit the Robert Ferguson Observatory website. If there are additional questions, please email info@rfo.org.

Sugarloaf Trail Crew @ Sugarloaf Ridge State Park
Nov 11 @ 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. Minors must be accompanied by a responsible adult. We will provide tools, and if allowed, lunch.

If you are a current State Parks volunteer, signup in Volgistics.

Otherwise, sign up here.

Family Hike @ Sugarloaf Ridge State Park
Nov 11 @ 10:00 am – 11:00 am

Come to the park for a peaceful hike through the woods! Join our Docents on this fun family hike that is good for all ages. During this 2-mile hike with 400-ft elevation gain, you will learn about Sugarloaf Park, its plants, animals, and history.
Free event. As of June 15, RSVP is no longer required. Meet outside the Visitor Center. Parking fees apply.

Hiking for Fitness– Maintenance Hikes @ Sugarloaf Ridge State Park
Nov 13 @ 9:00 am – 1:00 pm

Choose your own adventure! Part of our Hiking for Fitness program, these free, moderate-to-strenuous group hikes are geared to keep you motivated through the cold season. Parking fees apply. Maintenance Hikes are (usually) every second and fourth Saturday of the month.

11/13 – route A: Vista Trail Loop (clockwise): ~4.1 mi, 600ft elevation, meets @ main lot
route B: Crazy 8 Waterfall Loop + Vista Trail circuit: 6.5mi, 1400ft elevation, meets @ main lot
11/27 – route A: Goodspeed to Nattkemper bench: 4.2 mi, 1060 ft elevation, meets @ Goodspeed lot
route B: Goodspeed to Gunsight Rock: 6.5 mi, 2080 ft elevation, meets @ Goodspeed lot
12/11 – route A: Vista Loop (CCW): 3.6 mi, 700 ft elevation, meets @ White Barn lot
route B: Vista to Bald Mountain Loop: 6 mi, 1520 ft elevation, meets @ White Barn lot
12/18- route A: Brushy Peaks to Neptune picnic table: 4.3 mi, 650-ft elevation, meets @ White Barn lot
Senderos: Historia natural en Sugarloaf @ Sugarloaf Ridge State Park
Nov 20 @ 10:00 am – 12:00 pm

Historia Natural de Sugarloaf
Sábado 20 de noviembre, 10am-12pm

Aprenda acerca de la historia natural de Sugarloaf en una caminata familiar liderada por Breck Parkman, Arqueólogo Superior retirado del Distrito del Área de la Bahía. Nos reuniremos en el estacionamiento del granero blanco y caminaremos el sendero Meadow mientras escuchamos a Parkman hablar de la historia cultural, ecología, geología, y folklore de Sugarloaf. Este evento es bilingüe y gratuito pero le pedimos que por favor se registre ya que el espacio es limitado. Por favor vista calzado cómodo, ropa adecuada, y traiga agua para la caminata. Las lluvias fuertes cancelan el evento. Seguiremos las medidas apropiadas en acuerdo con órdenes del Departamento de Salud Pública del Condado. Si tiene preguntas, necesita transportación (dentro del Valle de Sonoma), o busca más información, por favor comuníquese con Alma (alma@sonomaecologycenter.org).

English: Natural History of Sugarloaf
Saturday, 11/20, 10-12pm
Learn more about the natural history of Sugarloaf in this family-friendly walk led by Breck Parkman, retired Bay Area District Senior Archaeologist. We will meet at the White Barn parking lot and walk on the Meadow Trail as we listen to Parkman speak of Sugarloaf’s cultural history, ecology, geology, and folklore.
This is a bilingual, free event planned around a primarily Spanish-speaking audience. Families from underrepresented groups are particularly welcome.
Registration is required as space is limited. Parking fees apply; heavy rain cancels. We will follow the appropriate guidance from the County’s Public Health Department. For questions, contact alma@sonomaecologycenter.org

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Read the Sonoma Ecology Center 2020 Impact Report!

Our parent organization, Sonoma Ecology Center, is proud to present 30 years of milestones in the areas of COMMUNITY, LAND, CLIMATE, WATER, and BIODIVERSITY.



Sugarloaf’s PPPP (Personal Porta Potty Program)

 Each campsite has its own porta-potty which our dedicated campground Staff cleans between each set of campers.  “The feedback from campers has been overwhelmingly positive”, said campground manager Woody Woodbury. “They like the safety as well as the convenience of having a toilet near their site,” he continued.

read more


  • Some Cool Finds During City Nature Challenge
    City Nature Challenge is an international event that takes place on the same weekend each year to encourage scientists and citizen scientists to document on the iNaturalist app any and all species they see in nature. Team Sugarloaf has participated in it for the past several years. Last year the pandemic interrupted a continuous run, and managers of Sonoma Ecology Center— which manages Sugarloaf—gave careful consideration to participating this year. “This year we decided to go whole hog with it,” says Dr. Dan Levitis, Community Science Coordinator. And they were rewarded with several incredible finds. In a remote northern part of the north side of Mt. Hood, a dozen naturalists spread out in teams to observe parts of the McCormick Addition of Sugarloaf Ridge State Park that burned in the 2020 Glass Fire.  “It burned quite hot last fall,” Dan says. “We found a lot of damage, but a ton of biodiversity coming back, including plants we hadn’t seen in a long time; fire followers, and some things that were not previously documented in the park.”… Read more »
  • Honoring Earth, Honoring Volunteers
    Sonoma Ecology Center and our illustrious, dedicated volunteers help us honor Earth every day, and we’d like to thank them for helping us take care of little patches of our planet right here in Sonoma Valley. In partnership with One Tree Planted and Simply Solar, volunteers and our restoration crew helped clear out invasive broom plants on Sonoma Creek. Scotch and French brooms were introduced in the 1800s and grow well here, so much so that they choke out native plants. When they die they create fire fuel ladders that are highly flammable.  Over at Nathanson Creek another great crew led by Sonoma Ecology Center’s “Earthling” teen volunteer group cleaned up trash and learned about pollinators, plants and ways to protect our planet. Our trail restoration work at Sugarloaf Ridge State Park continues with volunteers repairing steps and bridges, clearing debris, installing signs and generally taking care of the park’s trails. Large portions of Sugarloaf burned in 2020’s Glass Fire, and other portions — some overlapping — burned in the 2017 Sonoma Complex Fires. With… Read more »
  • A message from NEST student, Alexandra Huerta
    As someone who has always admired the grandeur of the outdoors and has an ever-present curiosity for exploring, understanding and preserving our natural world, studying environmental science just made sense. As a Southern California native, my summer days as a youth were full of salty hair, sun kissed skin and bare feet whenever possible. My pursuit of higher education took me to Penn State, where I was surrounded by an entirely new population of research driven, hard-working classmates. My time at Penn State not only offered me a well-rounded education, but it also gave me the opportunity to experience beautiful changing seasons, meet people from completely new and different walks of life, and taught me the value and importance of a sense of community. After graduating from Penn State, I moved back to California, eventually finding my way up the coast to Sonoma Valley. Sonoma has so much to offer us, teeming with natural beauty that we are able to appreciate all thanks to efforts from local conservation groups, local agriculture that provides us with farm fresh food… Read more »
  • New Ecological Scientist Training Program
    A message from Dr. Dan Levitis, Community Science Coordinator Sonoma Ecology Center is committed to helping diverse scientists overcome the barriers our persistently unlevel world puts in their paths. This is what motivates our New Ecological Scientist Training (NEST). NEST is an ecological research course that is not designed to teach ecology, but to equip […] Read more »
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