Hardest/Easiest Ironman by Age Group: 25 Races Compared

We took our analysis of 50,000 triathletes competing in 25 Ironman triathlons, and went deep into the race divisions to define the hardest races by age group. Here are the results for men; top 5 hardest per age group are highlighted in red. By Raymond Britt.

Click on chart to see full-size table.