OSS/CIA 50 Mile Night Run

JUN
13
2026
A night trail event in Prince William Forest Park offering 50 mile, 25 mile, and 10 mile races on a 25 plus mile loop with staffed aid stations at Telegraph Road Pavilion and Oak Ridge Camp Ground.
Sat 13 Jun 2026
50 miles 25 miles 10 miles

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OSS/CIA 50 Mile Night Run

The OSS/CIA 50 Mile Night Run takes place in Prince William Forest Park near Triangle, VA, with the Telegraph Road Pavilion serving as the event hub. The event offers multiple race distances.

  • 50 miles
  • 25 miles
  • 10 miles

The main course is a 25 plus mile loop run primarily on single track, with segments of fire road and several bridge and National Park Service road crossings. The 25 plus mile loop is run twice for the 50 mile distance. A night marathon option uses the same loop and shares the 50 mile event cut-off structure; the one-loop night event includes a specified time limit for completion.

Aid support includes two fully stocked main aid stations at Telegraph Road Pavilion and Oak Ridge Camp Ground. Two additional mini aid stations provide limited food, water, and Tailwind at the intersections of South Valley Trail with Scenic Drive and Burma Road with Scenic Drive.

Crew and pacer rules reflect park requirements. Crews are permitted only at the Telegraph Road Pavilion start and finish area and are asked to remain in place for safety. Crews and pacers must be inside the park and at the Telegraph Road Pavilion before nightfall. Pacers are allowed beginning on the second loop from Telegraph Road Pavilion.

Prince William Forest Park was used for Office of Strategic Services training prior to World War II. The park has about 37 miles of trails across more than 15,000 acres and is the largest protected natural area in the Washington, D.C. metropolitan region. Visit the organization's website for the most recent information.

50 mi
50 Miler
25 mi
25m
10 mi
10 Miler
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