The Next Loop Endurance Series - Lake Carl Blackwell
Lake McMurtry, United States • 23 May 2026
The Next Loop Endurance Series - Lake Carl Blackwell
The event uses a clearly marked 3.1 mile loop at Lake Carl Blackwell in Stillwater, OK. The loop runs through rolling lakeside terrain, open grasslands, and wooded sections, with expansive views of the lake and surrounding landscape. Runners return each lap to the same central start and finish area, which includes a fully stocked aid station.
The trail surface is a mix of dirt paths, grass, and lightly packed earth. Gentle rolling elevation and several wide sections provide generally good footing and reduce technical difficulty while still allowing repeated laps to be physically and mentally demanding.
The format is loop based. Athletes start together, complete one 5K loop at a time, and may choose whether to continue for additional laps. Every completed loop counts and is honored, without mandatory cutoffs. This structure lets participants pace themselves, refuel at the central aid station, and decide how far to go during the event.
Location: Lake Carl Blackwell, 11000 W Hwy 51, Stillwater, OK 74074
Distances offered: Visit the organization's website for the most recent information.
- 5K
- 10K
- 15K
- 13.1 miles (Half Marathon)
- 18K
- 26.2 miles (Marathon)
- 50K