These soggy soles belong to ultra-marathon runner Phil Studt.
This photo was taken just after he'd finished the 2012 GrimReaper Ultra 100.
It looks like he's developed a mild case of trench foot, which was a common condition during World War I.
It occurs when the bottom of your feet are subjected to wet conditions for hours on end.
Long story short: ultra-marathoners are insane.
Photo Credit: Fat Feet