Saw it mentioned below, but if you're interested in this stuff, I'd wholly recommend watching a documentary called "The Barkley Marathons" on Netflix. It's a 1

Saw it mentioned below, but if you're interested in this stuff, I'd wholly recommend watching a documentary called "The Barkley Marathons" on Netflix. It's a 100-mile race through the woods in Tennessee, with a 16,500m climb and a time limit of 60 hours. Only 14 people have ever finished. The documentary does a good job of interviewing the participants and the founder to get at what drives people to enter the race. Most believe (myself included) that overcoming truly challenging obstacles is an enriching experience. https://en.wikipedia.org/wiki/Barkley_Marathons https://en.wikipedia.org/wiki/Barkley_Marathons