This ultramarathon runner can't stop running! He ran for over 80 hours without sleeping—and it only gets crazier from there!

If you think that Forrest Gump liked to run, then you haven't seen anything yet! Dean Karnazes, an American marathon and running enthusiast, decided to set the bar pretty high by becoming one of the most famous ultramarathon runner in the world. What has he done that was so great? Run 350 miles without a wink of sleep!

Karnazes started running for fun when he started kindergarten, running from home to school just because he liked it. After taking a 15 year break due to fights with his high school track coach, he resumed running on his 30th birthday by completing a 30-mile run in his underwear and old yard-work shoes just on a whim.

Besides running 350 miles in 80 hours and 44 minutes in 2005 without sleep, he also ran a marathon to the South Pole (in -13-degree Fahrenheit) without snowshoes. His top accomplishment may be the 50/50/50, which is 50 marathons in 50 states in 50 consecutive days! He started in the Lewis and Clark Marathon in St. Louis in September of 2006 and finished with the New York City Marathon in November. What did he do after he was done? Ran back home from New York City to San Francisco.

(Source)