The Next Loop Endurance Series - Lake Carl Blackwell
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The Next Loop Endurance Series - Lake Carl Blackwell, Nov 21, 2026
The Next Loop Endurance Series is a loop-based trail event at Lake Carl Blackwell Park in Stillwater, OK, organized by EverFurther. The course is a clearly marked 3.1 mile (5K) trail loop that runners repeat as many times as they choose. Each completed loop counts toward an overall distance and is recorded for results.
The event records loop times and ranks participants by number of loops completed and combined total time. Runners may stop after any loop and still have those laps counted; there are no DNFs or cutoffs for stopping. A central aid station is available before each loop to provide hydration and basic nutrition, and the centralized loop format makes it practical for friends, family, or crew to support athletes between laps.
Distances build cumulatively by loop, and sample equivalences include:
- 1 loop = 5K
- 2 loops = 10K
- 4 loops = Half Marathon
- 9 loops = Marathon
- 10 loops = 50K
Entry is listed as a flat $100 fee. The event is produced by EverFurther, which presents this loop format as an alternative to fixed-distance races and provides loop-by-loop timing for performance analysis and pacing decisions. Visit the organization's website for the most recent information.
