For the second time in history, a record 3 people have completed one of the world's toughest races | CNN

A record three athletes complete the Barkley Marathons for the second time in the race's history.

The race consists of five loops of around 20 miles each, for a total of between 100 to 130 miles.

Athletes run the course over three sleepless days and nights and there are no aid stations, phones or GPS.