The Barkley Marathons, The World's Hardest And Quirkiest 100-Mile Race

Though there are numerous ultramarathons, competitions that exceed running or walking the traditional 26.2 miles, very few compare to The Barkley Marathons. The annual 100-mile race that challenges participants both mentally and physically has been completed by only 14 of the 1,100 total participants in its 30-year history. To put it in perspective, that is just two more than the number of people that have walked on the moon!