At the end of episode 192 Jonathan and Chad were discussing Iceman Cometh Challenge. ( https://www.iceman.com/ ) They guess it was likely a 100 mile race in the snow. It is actually just under 30 miles with the distance changing a bit every year due to a surprise finish create every year just before the race. I have down this race 4 years in a row and have only seen minimal flurries, meaning 4 straight year of “niceman”. In 2014 the conditions were bad and it was a “mudman”, and there were mean years I have heard of where it was a true “Iceman”.
The crew up there puts on a terrific race and the finish line area is some of what makes it such a special race with over 5,000 in the field.
Here is some history: https://www.iceman.com/pages/the-iceman-history
First half of this video gives you a bit of perspective of what the finish is like.