The Barkley Marathons - The Immortal Horizon

https://www.thebeliever.net/the-immortal-horizon/

The Barkley Marathons is an ultramarathon trail race held each year in Frozen Head State Park in Morgan County, Tennessee, United States. Described as "The Race That Eats Its Young", it is known for its extreme difficulty, purposefully difficult application process, and many strange traditions, having been completed only 26 times by 20 runners since 1995.