Top ultra runners will go after the world record in the 100k tomorrow in Phoenix wearing HOKA's updated Carbon X 2 super shoe.
Mario Mendoza ran on a treadmill for 6 hours, 39 minutes and 25 second to snag the 100k treadmill world record. Here's how he won the mental battle.
The race was taking place in one of the most remote parts of Australia.
Jonus Buud of Sweden and Kami Semick of the United States are the pre-race favorites.