Dean Karnazes is an ultramarathoner. Time Magazine named Dean Karnazes as one of the top 100 most influential people in the world. Karnazes is a frequent guest speaker at schools and youth groups encouraging others to follow a healthy lifestyle. Karnazes recently ran 50 marathons in all 50 United States in 50 days. His first marathon was in St. Louis, and the 50th marathon of this endeavor was the NYC Marathon, which he completed in 3:00:30. Karnazes then ran an ultramarathon covering 1,300 miles from New York City back to St. Louis Missouri. Karnazes is a winner of the Badwater Ultramarathon, which is considered the world's toughest footrace.
- Ultramarathon Man: Confessions of an All-Night Runner, by Dean Karnazes (2006)
- UltramarathonMan.com - official website of Dean Karnazes