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Devil Dog Ultras

Quick facts

Distance Ultra marathon

About Devil Dog Ultras

The Devil Dog Ultras features two distances, a 100-miler and a 100k, on the beautiful trails of Virginia’s Prince William Forest. This loop course has friendly, rolling single-track trails — great for runners looking to move up in distance — and race support that will knock your gaiters off.


100 Miler

  • 160.934km


  • 100km


Aid Stations

Each loop has three fully stocked aid stations (Camp Remi start/finish, Camp Gunny, Camp Toofy) and three unmanned aid stations (RP Alpha, Bravo, and Charlie) with only water. Crew are permitted at Camp Remi and Camp Toofy only. There’s no crew access at Camp Gunny or the RPs. At the manned aid stations, we’ll do our best to provide a variety of options for all diets, but if you have specific dietary restrictions or allergies, please be prepared to carry your own food.

Award Medals

Awards will be given to the top three male and female finishers, as well as the first-place active-duty military runner and first-place retired military runner. Ten-time finishers will receive a puppy.

Equipment Storage

Drop bags will be transported to the Camp Toofy aid station as well as left at the Camp Remi start/finish. Please put your name on the outside of your drop bag(s).

Maximum Time

Runners have 20 hours to complete the 100k and 32 hours to complete the 100-miler.

Devil Dog Ultras Route Map

Devil Dog Ultras Route Map


Prince William Forest Park's Camp 5



The course takes runners through the forest, providing scenic views along the way.


This loop course is primarily single-track trails, with occasional roots, rocks, and brief technical sections. There are also spurts of fire road and rolling hills but no substantial climbs. We'll have a breakdown of single-track, fire road and asphalt percentages soon, along with total elevation gain for both events. The first loop for both races is 23 miles, and subsequent loops are 19.5 miles. The 100k will complete three loops, and the 100-miler will complete five.

The race information has been found on the official website of the event or through publicly available sources. Always refer to the official website the latest race information. Please let us know if any data is wrong or missing, by emailing us.