OSS/CIA 50 Mile Night Run

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.