Furbutt's Backyard Ultra

Lorton, United States • 23 May 2026

Furbutt's Backyard 24 Hour and 12 Hour

Furbutt’s Backyard is a backyard ultra format event held at the Mustang Trailhead. The format requires runners to complete an hourly loop of approximately 4.167 miles; runners must return to the start corral at the top of each hour to continue. Failure to be in the corral at the hour means a runner is out of the event.

Distances and options:

  • 24 hour - 100 mile limit
  • 12 hour Furbutt After Dark - 50 mile limit

The course begins with a flat, open grassy field for about 0.7 miles before transitioning to dirt and crushed gravel bridle trails that are mostly flat with some gentle ups and downs. Total elevation gain per loop is about 300 to 350 feet. The start/finish area has a large horse trailer pavilion that serves as a central location for personal gear; no runner will be more than a five to ten second walk from the starting line. Parking is in the grass field behind the pavilion, placing vehicles close to the corral.

A single aid station at the start/finish will provide water, ice, Gatorade, and snacks. Runners are responsible for their own additional food and personal supplies at a personal aid station. Crews are allowed only at the event aid station and are not permitted elsewhere on the course.

Medical support is not provided by the club during the event. Runners are responsible for their own health and emergency care and should be aware of the risks of trail running. Visit the organization's website for the most recent information.

Race information

24 Hour
12 Hour
Visit the organization's website for the most recent information.
Trail runs nearby

Trail event at Agricultural History Farm Park in Derwood, Maryland offering marathon, 25K and timed 3 hour, 6 hour and 10 hour challenges on five mile laps with on course aid options.

A community 5K and 10K in Rock Creek Park on May 2, 2026, organized by Rock Creek Conservancy. The event blends trail and road running with guided tours, awards, and activities while supporting park restoration and future improvements.

A trail run on May 2, 2026 at 10709 Gunston Rd in Lorton offering a Fun Run, 5K, 10K and virtual options. Proceeds support no-cost enrichment programs at Gunston Elementary School.

Trail half marathon and an about 11K course at Fountainhead Regional Park near Washington DC, featuring rocky, rooty singletrack, stream crossings, notable elevation, and multiple aid stations with water and Gatorade.

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