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Vegan ultramarathoner Scott Jurek, 37. "He's the U.S. record holder for the 24-hour run, fitting 165.7 miles into a single day. Twice he's won the brutal Badwater race — that's 135 miles through Death Valley — and he's won the 100-mile Western States Endurance Run seven times. He does it all on a diet devoid of animal products. " Story from the Sierra Club.
Ultramarathon Man: Confessions of an All-Night Runner by Dean Karnazes. Karnazes is an ultramarathoner: a member of a small, elite, hard-core group of extreme athletes who race 100 miles and longer. Karnazes has run 226.2 miles nonstop; he has completed the 135-mile Badwater Ultramarathon across Death Valley in 130-degree weather; and he is the only person to complete a marathon to the South Pole in running shoes.