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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, Virginia, known for its historical ties to the U.S. intelligence community. The race features a 50-mile course primarily on single-track trails, with some fire roads and crossings, run twice to complete the distance.

A unique aspect is the incorporation of a night marathon starting late at night, adding to the event's intensity. Aid stations are strategically placed, and crew access is limited to the start/finish area for safety. The event celebrates the park's history as a former OSS training site and offers a demanding yet scenic trail experience for ultrarunners. 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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