RE: https://mastodon.social/@keithdunn/117484632187456024

This is in the context of a "backyard" ultra, where you run 100/24 miles every hour, on the hour, until you can't complete a lap. So not only is that 500 miles, but it's 5 days, where the only time to sleep is the gap between how fast you can finish a lap and the next hour starting.

(A particularly savage point about this format is there can only be one winner -- everyone else is a DNF -- so for every amazing feat, there's someone else who did it too, less one lap)