Devil Dog Ultras

DEC
5
2026
Experience the trails of Prince William Forest Park in Triangle, Virginia, with a selection of 100-mile, 100K, and 50K loop-based races featuring well-stocked aid stations.
Sat 5 Dec 2026
100 miles 100 kilometers 50 kilometers

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Event Overview

The Devil Dog Ultras is a trail running event held in northern Virginia at Prince William Forest Park. Based at Cabin Camp 5 in Triangle, the event features a loop-based course primarily consisting of single-track trails. Runners encounter occasional roots, rocks, and brief technical sections, alongside stretches of fire road and rolling hills. The course does not include substantial climbs and is thoroughly marked for navigation.

Distance Options

Participants can choose from three distinct distances:

  • 100-Mile: Consists of five loops, starting with a 23-mile loop followed by four 19.5-mile loops.
  • 100K: Consists of three loops, including an initial 23-mile loop and two 19.5-mile loops.
  • 50K: Consists of one 23-mile loop plus a 9-mile loop.

Course Logistics

The course features three fully stocked aid stations providing hot food: Camp Remi (start/finish), Camp Gunny, and Camp Toofy. Additionally, there are three unmanned resupply points providing water. Crew access is restricted to the Camp Remi and Camp Toofy stations only. The event has specific time limits for completion: 32 hours for the 100-mile, 20 hours for the 100K, and 10 hours for the 50K.

Registration and Requirements

Total entry is limited to 300 runners. To participate in the 100-mile distance, runners must have completed a 50-mile race within the two years prior to the event. There are no qualification requirements for the 100K or 50K distances. Lodging is available via 75 reserved bunkhouse beds at the start/finish area on a first-come, first-served basis. Visit the organization's website for the most recent information.

100 mi
100-Mile
100 km
100k
50 km
50k
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