DNF: three letters nobody wants to see next to their name. It’s an acronym for “did not finish,” and for some athletes who have put in the time and effort to prepare for racing the 140.6 miles of an Ironman triathlon, it can be a real sting to not see the finish line. But as difficult as it might feel, it’s also more common than most assume. On average, 8% of the athletes on the start line at an Ironman will not finish the race.
In this article, we’ll take a look at data from the last 13 years of Ironman racing to find the highest and lowest DNF rates, as well as some of the factors that lead to these extremes. We’ll answer questions like “Who has a higher DNF rate in Ironman racing: men or women?” and “Does previous racing experience matter in making it to the finish line?”