Bryan Muri prides himself as an ultra cyclist, competing in events of 100 or more miles, and many times, riding throughout a 24-hour time period.
He's already completed a 24-hour event at the Rocky Hill mountain bike race in Texas, as well as several other grueling mountain bike races.
Muri's latest conquest of 100 miles only took him 6 hours, 11 minutes to complete, but the stage of the Deer Creek Challenge in Littleton, Colo., was excruciating.