Last year, the Colorado town of Fairplay celebrated its 70th anniversary of pack burro racing - an ultramarathon event where runners run with their burros. It's an "ass-kicking" event that has become a hometown Colorado tradition.

What exactly makes an ultra runner different?  How does one become an ultra runner?  These unique individuals defy the human body and push themselves to the very limit of anatomical imagination.

Running sucks. At least in the beginning. You know it does. We know it does. We all know it. It's hard on your body and it could get boring. Then, why do you still run and for what purpose?

For some people, running a marathon just doesn't cut. They need more, longer distances that cover a span of 50 miles or more. These runners push their bodies to the limit and train for months in an effort to join an elite status, a community of extreme runners that challenges your mental focus and defies the human body.
Welcome to the world of Ultra Runners.