Dean Karnazes

Dean Karnazes, born Constantinos Karnazes on August 23, 1962, is an American ultramarathon runner. Ultramarathons are running events longer than the standard marathon, and his name is tied to that ultra endurance side of distance running. He is also the author of Ultramarathon Man: Confessions of an All-Night Runner, a book that sets out what ultra endurance running involves for a general readership rather than only for specialists. The introduction of his source names no specific race results, so this description stays with his nationality, his birth, his running discipline and his authorship.