The Next Loop Endurance Series - Lake Carl Blackwell

Stillwater, United States • 23 May 2026

The Next Loop Endurance Series - Lake Carl Blackwell

The Next Loop is a loop-based trail event held on a marked 3.1-mile (5K) trail loop at Lake Carl Blackwell Park in Stillwater, OK. The format lets each participant decide how many laps to complete; every finished loop counts toward the total distance.

The event uses hourly starts for each loop. Loop times are recorded from the start of the hour to the finish line. Final results are ranked by the number of loops completed and the combined total time. There are no penalties for stopping; completed loops still count as the official result.

Distances based on completed loops:

  • 1 loop = 5K
  • 2 loops = 10K
  • 4 loops = Half Marathon
  • 9 loops = Marathon
  • 10 loops = 50K

An aid station is available at the central base area before each loop to provide hydration and basic nutrition. The centralized loop format keeps support, crew, and spectators close to the course between laps.

Practical details include a flat entry fee of $100 and the event location at Lake Carl Blackwell, 11000 W Hwy 51, Stillwater, OK 74074. Registration closes on Fri, May 22 at 11:59 PM CT.

The event is presented by EverFurther Events and is intended for runners exploring longer distances as well as those testing endurance using a loop-by-loop approach. Visit the organization's website for the most recent information.

Race information

50 km
10 Loops (50k)
Marathon
9 Loops (marathon)
Half Marathon
4 Loops (half Marathon)
10 km
2 Loops
5 km
1 Loop
10 Hour Endurance
Visit the organization's website for the most recent information.
Trail runs nearby

Trail races at Lake McMurtry in Stillwater, OK span from 5K to 50K with ruck divisions, lakefront single-track trails, stocked aid stations, finisher medals, race photos, and on-site packet pickup.

Experience a continuous loop trail race at Lake Carl Blackwell with 40 and 50 mile challenges. Enjoy frequent access to a fully stocked aid station and dedicated gear staging areas in a supportive community environment.

Test your resilience at Lake Carl Blackwell with 25K or 50K trail races featuring optional mental and physical challenge stations. Earn time credits through strategy and grit in this unique multi loop endurance event in Stillwater.

Trail races at Lake Liberty in Guthrie, OK on November 7, 2026. Distances range from 5K to 50K on a 7.8 mile loop and a ruck division is available with set weight rules; finishers receive custom buckles or medals.