Logo

Devil Dog Ultras

Triangle, United States • 6-7 Dec 2025

Devil Dog Ultras is an exciting trail running event held in Prince William Forest Park, Virginia, featuring 100-mile, 100K, and 50K races. The course consists of primarily single-track trails with some technical sections, and runners can expect well-stocked aid stations throughout the loops. Participants have specific time limits to complete their chosen distances, and new for 2025 is the Devil Dog Dynasty Challenge, rewarding runners for completing multiple distances over consecutive years. Registration opens in January 2025, with limited spots available, and bunkhouse accommodations are offered for convenience. Visit the organization's website for the most recent information.

United States Virginia Triangle

Race information

Website Registration
100 mi
100-Mile
100 km
100k
50 km
50k
Visit the organization's website for the most recent information.
Trail runs nearby

Chopawamsic

Prince William County - 21 mi from Triangle

The Chopawamsic Challenge is an exciting 50K and 100K foot race held in Prince William Forest Park, designed for both seasoned ultra-marathoners and those looking to extend their trail running experience. The event features a scenic course with over 90% single-track trails, offering significant elev..

Spring Backyard Burn Trail Run - Pohick Bay

Lorton - 12 mi from Triangle

The Spring Backyard Burn Trail Run at Pohick Bay is a thrilling event scheduled for April 27, 2025, featuring 5-mile and 10-mile trail races. Set against the scenic backdrop of Gunston Cove and adjacent to the Mason Neck National Wildlife Refuge, participants will enjoy a mix of technical trails, st..

Dahlgren Trailblazer

King George - 21 mi from Triangle

The Dahlgren Trailblazer is an annual community bike event held in King George, Virginia. Participants embark on a friendly 8-mile ride starting from the trailhead at 10431 Bloomsbury Road, turning around at 9274 Comorn Road. The event is organized by the Friends of the Dahlgren Railroad Heritage Tr..

Fountainhead Half Marathon Trail Run

Fairfax Station - 17 mi from Triangle

The Fountainhead Half Marathon and 10K Trail Run, taking place in Fairfax Station, VA, features challenging and scenic courses through Fountainhead Regional Park. Participants can choose between a half marathon (approximately 13.5 miles) and a 10K (approximately 6.9 miles), both of which include sec..

Capital Backyard Ultra

Lorton - 12 mi from Triangle

The Capital Backyard Ultra is a unique endurance running event held in Lorton, Virginia, designed for a maximum of 60 participants. The race features a 4.167-mile loop that starts on the hour, with runners competing until only one remains. The event emphasizes camaraderie and support among experienc..

OSS/CIA 50 Mile Night Run

Triangle

The OSS/CIA 50 Mile Night Run is a unique endurance event set in the historic Prince William Forest Park, which served as a training ground for the OSS, the precursor to the CIA. Participants will tackle a challenging 50-mile course that consists of a 25+ mile loop run twice, primarily on single-tra..