1.) An insanely bad-ass long run that tests the mental toughness of the world's finest athletes; A supreme test for athletic prowess
2.) the hardest thing a human can do
3.) a run longer than 26.2 miles, although most "ultras" are 50 miles, 100 miles or 100+ miles
"He ran an ultramarathon, you've only climbed Mt. Everest once"

"There are more Harvard Phd's than Ultramarathoners"
by xtremerunner88 October 14, 2009
Get the Ultramarathon mug.
1.) An insanely bad-ass long run that tests the mental toughness of the world's finest athletes; A supreme test for athletic prowess
2.) the hardest thing a human can do
3.) a run longer than 26.2 miles, although most "ultras" are 50 miles, 100 miles or 100+ miles
"He ran an ultramarathon, you've only climbed Mt. Everest once"

"There are more Harvard Phd's than Ultramarathoners"
by xtremerunner88 October 14, 2009
Get the Ultramarathon mug.