The one 50k and Half Marathon to cross Sugarloaf Ridge State Park over into Hood Mountain. Just a tough race. No sugar coating it.

Sugarloaf Ridge State Park

October 27, 2018


We were shut out by fire and now we’re BACK IN ACTION!


With 9,000 ft of elevation gain, SUGARHOOD arguably stands as one of the toughest 50K’s in California. The half-marathon, not to be outdone, also holds its own boasting nearly 4,000 ft of gain and tough, grinding climbs.

Nestled in the hills above Kenwood, Hood Mountain Regional Park and Sugarloaf Ridge State Park feature amazing scenery and an extensive network of trails to explore. These courses are not made for achieving personal best times and will prove to be a challenge for even the most accomplished runners, but what they lack in speed they more than make up for in stunning vistas, rugged ground, and elevation gains to assure participants the satisfaction that comes from completing a strenuous day on the trails.

Sugarhood is a great challenge at the end of your ultra season, or a great key training race for winter racing. Come meet the warm local community that has embraced this race, with great runners like Hoka ONE runner Bob Shebest and all of the runners from ReddAntler Running!

Camping is available for both Friday and Saturday nights. See our add-on options for more information.

Sugarloaf Ridge 50k – 1/2 Marathon

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  • Half Marathon

    The Half Marathon will be staged out of Los Alamos Trailhead where runners will traverse the valley before ascending the rocky Summit Trail to the first aid station. From there, the course descends the side of the mountain, on a combination of rocky fire road and shaded singletrack, to the second aid station. Runners will ultimately climb their way back up to the summit of Hood Mountain before a final descent to the valley and one last little uphill finish.
  • 50K

    The 50K will follow the same route as the half, through the first two aid stations and all the way back to the summit. From the summit, 50K participants will split off down the rugged Nattkemper/Goodspeed trail for a wild ride with epic views and technical footing. After a stop at the aid station, runners will travel on a long loop into Sugarloaf Ridge State Park, with plenty of ups and downs, before returning to begin the long climb to the Summit. After the long push to the summit, the reward will be a nice descent back to the valley where one last uphill climb awaits at the finish.

Times, Getting here, Where to stay


50K: 7:30am Start

Half Marathon: 8am Start


Hood Mountain Regional Park is located a little over an hour north of San Francisco off of Hwy 12 in Santa Rosa. Take Los Alamos Rd. off Hwy 12 for a little over 4 miles and enter the park. Once you enter, continue down the road to the parking lot and you'll see signs for the event.


We will have a limited number of campsites available for Friday and Saturday. See our add-on options for specific details about camping packages.

For complete area information and additional lodging options, please visit the Sonoma Valley visitors guide. For runners that are interested in renting a home near the park for the weekend, many choices can be found on VRBO.

Awards, Drop bags, Time limit


We will have awards for the top 3 male and top 3 female finishers.


Drop bags will be available at the Goodspeed aid station (mile 12.4 and 23.1) and will be transported back to the finish once the aid station closes. Please clearly label all drop bags with name and number.


There is an 11 hour time limit for the 50K with a hard cutoff at the Goodspeed aid station (2nd pass/ mile 23.1) at 3:30pm.

Frequently Asked Questions

Is there a pre-race packet pickup?


I am new to trail running, will I get lost?

We welcome rookie trail runners and make every effort to ensure a great experience. The courses will be thoroughly marked, and each turn will have multiple ribbons along with a sign pointing you in the right direction. There will be no areas where you'll need to guess.

Are there finisher awards?

While we do offer a hearty congratulations, along with various race swag, we strive to emphasize the experience over the medals, and thus devote more energy toward the things that will make the race one to remember, including an elaborate post-run bbq and beer extravaganza where you can connect with your fellow finishers.

Are there things for my family to do at this location?

Sugarloaf Ridge State Park is a wonderful place to bring the family! The campground loop has long flat roads for kids to bike and play, as well as a solar system walk and many fun nature hikes. The Robert Ferguson Observatory is a wonderful place for stargazing at night. Additionally, the intersection of Hwy 12 and Adobe Canyon Rd (the entrance to the park) is home to an abundance of wineries to sample local vintages.

Can I hike the event?

Yes, we believe everyone should get a chance to experience these beautiful trails, regardless of pace. Due to the highly challenging terrain and elevation profile, the 50K will require an approximate pace of 20 minute miles to complete under the time limit.

Do you need volunteers?

Our races depend on the generous spirit of the running community to ensure every participant is well supported. Volunteers will receive a free entry to a future Scena Performance event. Please fill out the volunteer form for more information.