And I am absolutely fascinated by it.
I had not known about it until I past a woman biking across Arizona with a support car following. When I got to the campsite (vacation with the family), I googled and determined she was participating in a race called "RAAM". I couldn't believe it was a non-stop race across the U.S. Sleep, or any kind of rest, is a liability.
I guess I had expected the race to be broken up across a dozen days or so with checkpoints and times taken and added to declare the winner by race's end. But, no, it's just crazy.
And I guess it's the thing that endears me so much to our species.