The Next Loop 50-Mile Challenge - Lake Carl Blackwell - Stillwater

NOV
21
2026
A loop based trail event at Lake Carl Blackwell in Stillwater, OK offering 40- and 50-mile continuous races with chip timing, loop splits, a 12 hour cutoff for 50 miles, on-course aid each lap, staging areas, and pacer support after 4:00 PM.
Sat 21 Nov 2026
50 miles 40 miles

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The Next Loop 50-Mile Challenge at Lake Carl Blackwell

The Next Loop 40/50 Mile Challenge in Stillwater, OK is a loop based trail event held at Lake Carl Blackwell. The event offers multiple long-distance formats and uses a continuous race style with a single start/finish aid station that serves runners every lap.

Distances include:

  • 50 Mile Challenge
  • 40 Mile Challenge

The 50 mile format uses chip timing and records loop splits for every completed lap. Placement is determined by overall finishing time rather than an hourly scoring format. A 12 hour hard cutoff applies to the 50 mile race. The course is trail based and minor distance variation may occur due to terrain.

Logistics include a dedicated staging area for 50 mile athletes and the ability to leave personal gear at a vehicle or in the designated staging area. A main aid station is available each lap. Pacers are permitted beginning at 4:00 PM; pacers must check in at the designated pacer station, wear official pacer identification, and enter and exit the course at the start/finish area only. Multiple pacers are allowed one at a time.

The event lists a field limit of 75 runners. Registration closes on Fri, Nov 20 at 11:59 PM CT. Visit the organization's website for the most recent information.

50 mi
50 Mile Challenge
40 mi
40 Mile Challenge
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