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OSS/CIA 50 Mile Night Run

Triangle, United States • 14 Jun 2025

The OSS/CIA 50 Mile Night Run is a challenging ultramarathon held in Prince William Forest Park, Triangle, Virginia, a historic site once used to train OSS spies during World War II. The event features a 50-mile race consisting of two laps on a 25+ mile loop primarily on single-track trails, fire roads, and several bridge and road crossings. A night marathon option covers one loop with an 8.5-hour cutoff.

Aid stations are located at the start/finish (Telegraph Road Pavilion), halfway point (Oak Ridge Campground), and two mini-aid stations along the course. Crews are restricted to the start/finish area for safety, and pacers are allowed on the second loop. The park offers a scenic and historic backdrop with over 37 miles of trails across 15,000+ acres. Visit the organization's website for the most recent information.

United States Virginia Triangle

Race information

Website Registration
50 mi
50 Miler
25 mi
25m
Visit the organization's website for the most recent information.
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