In the Rocky Mountains on a century-old public highway sits the most dangerous racetrack in America. The 12.7-mile course wraps around the legendary Pikes Peak and ends at the mountain's 14,115-foot-tall summit. But even with its deadly hazards, which include 156 blind turns and steep cliffs with no guardrails, drivers continue coming back for the annual Pikes Peak Hill Climb race. So just what sets it apart from the hundreds of other professional racetracks in the US?