The Barkley Marathons, a notoriously difficult ultramarathon held in Frozen Head State Park, Tennessee, is known for its challenging terrain, unusual origin story, and founder, Gary "Laz" Cantrell. The race's difficulty is highlighted by experienced trail runners who deem it the hardest race globally.
The Barkley Marathons is an ultramarathon considered by many to be the hardest race in the world.
It was created by Gary "Laz" Cantrell, inspired by the escape of James Earl Ray from Brushy Mountain State Penitentiary.
The race takes place in the remote Frozen Head State Park, Tennessee, utilizing rough terrain and former prison trails.