OSS/CIA 50 Mile Night Run

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.