Description: (American Ultramarathon Runner, and Author of 'Ultramarathon Man: Confessions of an All-Night Runner')
Dean Karnazes began running for fun while in kindergarten; taking diversionary routes while returning home from school. Slowly, he started taking it more seriously, running a marathon to the South Pole in 2002, embarking on the Endurance 50: 50 marathons in 50 states in 50 consecutive days in 2006.  Currently a businessperson, he has also written a book on marathon.