The Next Loop: 50-Mile Challenge, Lake Carl Blackwell, OK /Nov 2026

The Next Loop 50-Mile Challenge is a loop-based trail ultra held at Lake Carl Blackwell in Stillwater, Oklahoma, during November. The 50-mile race consists of a 3.1-mile loop, requiring runners to complete the same marked course 16 times, with minor distance adjustments possible due to trail conditions. This is a limited-field event, restricted to 75 runners for the 50-mile distance, featuring a shared mass start, chip timing for each completed loop, and a strict 12-hour cutoff.