How to read it: in each row, the time under "Top 10%" is the time of the slowest athlete who still made the fastest 10% of the age group. Beat that time and you are in. Age groups with fewer than 5 finishers are omitted. Finishers only.
Men
| Age group | Finishers | Top 1% | Top 5% | Top 10% | Top 20% | Median | Best |
|---|---|---|---|---|---|---|---|
| All age groups | 55 | 4:48:56 | 4:57:35 | 5:31:37 | 5:38:41 | 6:18:52 | 4:48:56 |
| M18-24 | 13 | 4:48:56 | 4:48:56 | 5:05:23 | 5:31:37 | 5:48:45 | 4:48:56 |
| M25-29 | 6 | 4:52:23 | 4:52:23 | 4:52:23 | 5:34:44 | 6:28:09 | 4:52:23 |
| M30-34 | 5 | 4:57:35 | 4:57:35 | 4:57:35 | 4:57:35 | 5:47:17 | 4:57:35 |
| M35-39 | 7 | 6:00:51 | 6:00:51 | 6:00:51 | 6:18:52 | 6:24:27 | 6:00:51 |
| M40-44 | 10 | 5:37:57 | 5:37:57 | 5:37:57 | 5:38:41 | 6:37:23 | 5:37:57 |
| M45-49 | 7 | 5:45:18 | 5:45:18 | 5:45:18 | 6:00:46 | 6:43:54 | 5:45:18 |
Women
| Age group | Finishers | Top 1% | Top 5% | Top 10% | Top 20% | Median | Best |
|---|---|---|---|---|---|---|---|
| All age groups | 12 | 4:55:21 | 4:55:21 | 6:12:55 | 6:17:43 | 6:43:12 | 4:55:21 |
Source: Seffrin A., Nikolaidis P.T., Andrade M.S., Villiger E., Rosemann T., Weiss K., Ferreira D., Knechtle B. (2026). A dataset of 2.7 million IRONMAN triathlon records with transition times (2002-2026), v3.0.0. Zenodo. CC BY 4.0. doi:10.5281/zenodo.22097794.