Unbound XL
About 350 miles alone through the Flint Hills, with no checkpoints and no crew.
- Distance
- 357 mi (575 km)
- Climbing
- 13,986 ft (4,263 m)
- Time limit
- 36 h
Take this course offline
Download its map in Goat Maps and you can find the next checkpoint without a signal.
In 2026 the XL started at 3:00 PM on Friday and had until 3:00 AM Sunday to finish, 36 hours. There are no official checkpoints and no outside support anywhere on the course: you resupply from stores in the towns the route passes, and the guide lists them with their opening hours. Matfield Green, at mile 161, had neutral aid from Life Time with GU and water.
You must carry a satellite tracker registered with Follow My Challenge. The tracking fee is part of the entry, and you can rent a tracker if you don't own one. The minimum age is 18.