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The Next Loop Endurance Series | Lake Carl Blackwell
Saturday, May 23, 2026 · Stillwater, United States
Distances
5K
5K
10K
Half
Full
Start location
11000 W Hwy 51
Stillwater, OK
About this race
The Next Loop Endurance Series challenges runners with a 3.1-mile trail loop. Start a new loop every hour on the hour. After each loop, decide whether to continue or stop. Only completed loops are counted. This format tests discipline, recovery, decision-making, and endurance. It is for first-time 10K participants to seasoned ultra runners and functional athletes. Run the loop. Recover. Decide. Repeat. Find your next limit, one loop at a time.