The Next Loop Endurance Series - Lake Carl Blackwell

The Next Loop Endurance Series - Lake Carl Blackwell

The Next Loop Endurance Series takes place at Lake Carl Blackwell Park in Stillwater, Oklahoma. This event features a loop-based format where participants navigate a 3.1-mile (5K) trail loop. The structure allows individuals to decide how far they want to run as they go, with each completed lap counting toward a total distance milestone.

The course consists of a clearly marked trail through natural terrain. The event follows a specific hourly structure: a new loop begins at the top of every hour. Participants complete the loop, utilize the remaining time in the hour to rest or refuel at the central base area, and then decide whether to start the next lap.

Available distance milestones based on completed loops include:

• 5 km (1 loop)
• 10 km (2 loops)
• 21.1 km (4 loops)
• 42.2 km (9 loops)
• 50 km (100 loops)

The event focuses on a flexible format without traditional cutoffs or penalties for stopping. Final results are determined by the total number of loops finished and the combined time taken to complete them. Loop timing is recorded from the start of the hour until the finish line is crossed. A central aid station provides hydration and nutrition at the base area, which also serves as a location for crew and spectators to support the participants throughout the day. Visit the organization's website for the most recent information.