May 11, 2012 01:16 PM
By Raymond Britt -- There is no such thing as an Easy Ironman. Covering 140.6 miles on any course, any day, in any variety of conditions, is a monumental challenge. Everyone who crosses the finish line knows how hard an Ironman triathlon is. But we were curious . . .
The RunTri Challenge Index. We had long been interested in a quantitative comparison, but found none, so we created the list -- the RunTri Challenge Index. RunTri analyzed nearly 50,000 triathletes competing in 25 Ironman distanc