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! Group camping available as well.

PARK OPEN 10 AM Thursday, JAN 17.

No major slides or trees on road.  Be careful of crews and small rocks on road.  Drive slowly! 

Caminata a la cascada @ Sugarloaf Ridge State Park
Jan 19 @ 10:00 am – 11:30 am

¡Descubre el parque en todas las estaciones! Únase a nosotros para un paseo increíble a la cascada.

Este evento es bilingüe.

Si tiene alguna pregunta contacte a Alma Shaw en info@sugarloafpark.org


Hike to the Water Fall (Español)
Experience the park in all seasons!

Experience the park in all seasons! Join us for a (potentially drizzly) amazing walk to the Sugarloaf waterfall. Opportunities for beginning and advanced hikers. Meet at visitor center. No charge for the hike, parking is $8 per vehicle.

This event is bilingual.

If you have any questions contact Alma Shaw at info@sugarloafpark.org

Family Hike @ Sugarloaf Ridge State Park
Jan 21 @ 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.

Ferns & Friends @ Sugarloaf Ridge State Park
Feb 2 @ 10:00 am – 11:30 am

Lets look at plants that flourish during our cool moist winters. We’ll identify a least five native ferns and several mosses, and discuss life forms and habitats. Bring a hand lens if you have one. Easy/moderate walk, 3 miles, some uphill/downhill. Rain cancels. Parking fees apply. Bring a lunch to enjoy afterwards.

RFO Solar Viewing @ Robert Ferguson Observatory
Feb 2 @ 11:00 am – 3:00 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 (see schedule at left).

Daytime Solar: Solar telescopes are set up so you can safely look at and listen to our favorite star, the Sun.

For more information, visit: rfo.org


The Robert Ferguson Observatory: Both peaked roofs roll back to reveal the telescopes inside.
The dome opens and revolves with its telescope. The tall poles attached to the sides of the building
are part of RFO’s radio astronomy set-up that allows us to listen to the Sun. Photo: Mark Hillestad

Yoga Hike – session 1 @ Sugarloaf Ridge State Park
Feb 2 @ 11:00 am – 1:30 pm

Susan Topf’s Yoga Hike balances a mix of easy hiking and gentle yoga postures, breath work and guided meditation. No mat necessary. Please wear weather appropriate clothing to feel comfortable being in a natural setting and bring water (as needed). Route varies on weather conditions and group interest that typically covers 2-3 miles of varied terrain. Cost is $20 and includes parking if registered in advance online. Purchase the yoga pass for each group of 3 sessions this year and save $10. All levels and ages welcome. Meet at the Visitor’s Center unless otherwise noted in confirmation email prior to the hike.

Sonoma County Resident? 
Free with Park Rx from participating Sonoma County Medical Provider. See http://parkrx-sonomacounty.org/ for more ParkRx info.

Tickets – https://www.brownpapertickets.com/event/3913399

RFO Public Star Party @ Robert Ferguson Observatory
Feb 2 @ 8:00 pm – Feb 3 @ 12:00 am

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.

Star Parties: Presentations on astronomical topics are given in the classroom throughout the course of the evening. Starting at dusk, the Observatory’s three main telescopes are open for your viewing. Docents set up additional telescopes in front of the building. Friendly and knowledgeable docents are available to answer your questions.


  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.

Classroom presentations are always offered on Star Party nights even if the weather is poor. For current conditions call the observatory at 707/833-6979.
For more info please visit Robert Ferguson Observatory Website: http://www.rfo.org/.

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. La caminata es gratis, 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. No charge for the hike, parking is $8 per vehicle. This event is bilingual.

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

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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

School Programs

Sugarloaf offers a wide range of educational opportunities for classes of all ages! Featuring 25 miles of trails, year-round camping, a seasonal waterfall, one of the highest peaks in Sonoma County, and the headwaters to Sonoma Creek!