Furbutt's Backyard Ultra
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Furbutt's Backyard 24 Hour
Furbutt's Backyard 24 Hour is the Virginia Happy Trails Running Club's version of the Backyard format, held over Memorial Day in the Meadowood Special Recreation Area on Mason Neck near Lorton, at the southern end of Fairfax County, Virginia. The start and finish are under a large horse pavilion at the corner of Gunston Road and Harley Road.
The event uses the Backyard rule set: runners have one hour to complete a 4.167-mile loop and must be in the start corral at the top of each hour to continue. The course begins with 0.7 miles on a flat, open grassy field and then follows dirt and crushed gravel bridle trails through mostly wooded sections and some open meadows. Per-loop elevation gain is about 300 to 350 feet and the total ascent/descent listed is 7,800 feet.
Entry opens on March 23, 2027 at 9:00 am and is limited to 100 runners. A $25 fee helps cover permit and event expenses. The single aid station at the pavilion will provide water, ice, Gatorade, and snacks; runners should bring any additional food or personal supplies for their own use. Crews are allowed only at the main aid station and crew contact is not permitted inside the corral once a yard begins. Warning whistles and verbal countdowns are used before each hourly start.
The event policy notes that no medical personnel or medical supplies are provided by the club; runners are responsible for their own health and safety and emergency response may be remote. Visit the organization's website for the most recent information.
