After running and power walking 487 miles from Littleton to Durango to complete the Colorado Trail in record time, trail runner Kyle Curtin had plenty of time to reflect on the experience because the physical wear and tear he endured put him in a Durango hospital room. Curtin’s goal was to finish with the “fastest known time,” the vernacular endurance athletes use to describe record efforts, and to become the first to do it in less than a week.