How do you go through 5 pairs of shoes, 18 pairs of socks and 3 toenails? Well, if you're Dean Karnazes (aka: the Ultramarathon Man) you do it by running 50 marathons in 50 states in 50 consecutive days.

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In a sport where people consider 30 miles a training run and count the number of toenails they've lost as badges of honor, Karnazes is a rock star. He is the Bono of ultramarathoning, a sport made up of races longer than the standard 26.2-mile marathon.

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This fall, 43-year-old long distance runner [Dean Karnazes] will tackle one marathon a day for 50 consecutive days, running a total 1,310 miles (2,108.2 km) in 50 days. And for each 26.2-mile (42.2 km) race, Karnazes and his family of four will travel to a different U.S. state.

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