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.
Arguably the world's best-known ultramarathoner, Karnazes has already run 350 miles (563.3 km) in one stretch, run a marathon in the South Pole, and raced across the California desert in the middle of the summer.
With this fall's challenge, however, Karnazes said on Tuesday he is going a step further in testing the human body's limits.



