Devil Dog Ultras is a trail ultramarathon held each December at Prince William Forest Park in Triangle, Virginia.
Runners can choose from three distances: 50K, 100K, or 100-miles.
The course is a loop-based trail route, primarily single-track with rolling hills, technical sections, and fire-road stretches. Aid stations—both staffed and unmanned—are placed throughout; crew support is allowed at designated spots.
Cutoff times are generous: typically ~10 hours for the 50K, ~20 for the 100K, and ~32 for the 100-mile distance.
It’s organized by an experienced trail-running community, known for strong volunteer support, well-marked trail, and a friendly but challenging atmosphere.
