Barkley 100 - World's most difficult and bizarre sporting event?

Once a year in late March, 40 athletes from around the world attempt the Barkley Marathons. It is considered one of the thoughest and most secretive ultramarathons in the world.
Only 14 runners have finished in 30 years.
This documentary attempts to tell the story of one of the world's most difficult and bizarre sporting events: The Barkley Marathons. This 100-mile footrace and its 60-hour time limit force athletes to run, crawl and climb an elevation gain equivalent to two treks up Mt. Everest. In nearly thirty years, only fourteen runners, out of over one thousand participants, have finished The Barkley.
Directed and Edited by Brendan Young
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Director of Photography: Isaiah Branch-Boyle
Original Score by Keith Shacklett