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Numbers behind endurance racing: qualification maths, course analysis and what race results actually say.
23 October 2026 · Results · Full distance
What a 12-hour IRONMAN means at 35 and at 55
Finish times are compared across ages as if they meant the same thing. They do not. From 147,774 full-distance finishes since 2024: percentiles for every age group, where the time goes with age, and a table that translates your result into any other group.
23 October 2026 · Courses · 70.3
The fastest and slowest IRONMAN 70.3 courses, measured on the same athletes
Everyone says Nice is slow and Erkner is fast. We measured it: 50,000 athletes who raced two or more 70.3 courses since 2024, compared against themselves. The spread between the fastest and slowest course is 66 minutes.
22 October 2026 · Qualification · 70.3
The 2026 IRONMAN 70.3 qualification maths, with the real numbers
IRONMAN now ranks age-groupers by age-graded time. Here is what the 70.3 Standard is built from, what your finish is worth in every age group, and who actually takes the slots when you run the formula over a 1,700-finisher race.