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

Name: The Next Loop 50-Mile Challenge - Lake Carl Blackwell - Stillwater
Start: 2026-11-21
End: 2026-11-21
Location: Stillwater

Stillwater, United States • 21 Nov 2026

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

The Next Loop 50 Mile Challenge takes place in Stillwater, Oklahoma at 11000 W Hwy 51 on Saturday, November 21, 2026. The event offers multiple long distance options and is presented as part of The Next Loop Endurance Series.

Distances include:

50 Mile Challenge
40 Mile Challenge

The 50 mile race is run as a continuous loop format with a main aid station available every lap. A 12 hour time limit is enforced for the 50 mile distance. Chip timing records loop splits and overall finishing time. Athletes may stage personal gear at their vehicle or in a designated staging area. Pacers are permitted beginning at 4:00 PM and must check in at the designated pacer station and follow pacer procedures. Field size is limited and standard ultra safety and medical oversight are provided.

Age group divisions recognize Open, Masters ages 50 to 69, and Grand Masters ages 70 and older. The event is produced by EverFurther Events. Registration closes Friday, November 20 at 11:59 PM CT. Visit the organization's website for the most recent information.

United States Oklahoma Stillwater

Race information

Website Registration

50 mi

50 Mile Challenge

40 mi

40 Mile Challenge

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday May 23

The Next Loop Endurance Series - Lake Carl Blackwell

...

Looped 3.1 mile laps at Lake Carl Blackwell let runners choose distances from a single 5K up to a 50K. The trail mixes dirt, grass and packed earth and features a central aid station and marked course.

Saturday May 23

The Next Loop Endurance Series - Lake Carl Blackwell - Stillwater

Stillwater

40 mi

50 mi

A loop based 50 mile trail challenge at Lake Carl Blackwell in Stillwater OK, run on 3.1 mile loops with a 12 hour cutoff, chip timing, and permitted pacers during later stages.

Saturday Nov 7

Liberty's Lost Treasure

Trail races at Lake Liberty near Guthrie, OK offering 5K, 12.5K, 25K, 50K and ruck divisions on a 7.8 mile loop. One aid station about four miles in and a start/finish at the trailhead near campsites.

Saturday Nov 21

The Next Loop Endurance Series - Lake Carl Blackwell - Stillwater - Stillwater

...

A loop based endurance event at Lake Carl Blackwell where runners repeat a clearly marked 3.1 mile trail lap and new loops begin each hour. Each completed lap counts toward distances from 5K up to 50K and loop times are recorded.