Summary: In the Barkley Marathons' thirty years, only 14 people have ever completed it. But it’s not for lack of trying. Some 1000 runners have attempted to complete Barkley’s five loop course of agony through Frozen Head State Park in Tennessee. The route is supposed to be 100 miles, but Barkley veterans guess that it’s more like a very hilly 130. With no GPS, no course markers, and not an aid station to speak of, sleep deprived runners are challenged more than just physically. For the vast majority of runners, this race isn’t about finishing. It’s about pushing themselves to their absolute limits.<br><br><strong><em>This episode of Human Race is brought to you by </em></strong><a href="http://www.brooksathlete.com/rw"><strong><em>Brooks</em></strong></a><strong><em>. Sign up for the Brooks Big Endorsement and become a sponsored athlete at </em></strong><a href="http://www.brooksathlete.com/rw"><strong><em>www.BrooksAthlete.com/rw</em></strong></a><strong><em>.</em></strong><br><br><strong>Further reading</strong>:<br><a href="http://www.runnersworld.com/races/the-2016-barkley-marathons-one-person-finishes"><em>The 2016 Barkley Marathons: One Person Finishes!</em></a> by Brian Dalek<br><a href="http://rw.runnersworld.com/selects/notorious.html"><em>Notorious</em></a> by Charlie Engle<br><br><strong><em>Episode Credits</em></strong><em>:</em><br><em>Host: Rachel Swaby <br>Producers: Brian Dalek, Rachel Swaby <br>Editor: Audrey Quinn with help from Christine Fennessy <br>Production help: Mervyn Degaños <br>Thanks to Pam Bede from Swim, Bike, Run, Eat! and Bryce Mander from UC Berkeley’s Sleep and Neuroimaging Laboratory for their help on this story <br>Theme music: Danny Cocke <br>Human Race editor-in-chief: David Willey </em>
