On the coldest day of the year in the coldest place in America, the Arrowhead 135 ultra-marathon is not for the faint of heart. Competitors have 60 hours to run, bike, or ski over three days in snow-covered woods where hallucinations, frostbite, starvation or potentially freezing to death is a risk they're willing to take.
IMDb 7.4/1020231 h 37 min 
