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 | 85 | 4:15:40 | 4:43:36 | 5:00:36 | 5:16:21 | 6:13:20 | 4:15:40 |
| MPRO | 5 | 4:15:40 | 4:15:40 | 4:15:40 | 4:15:40 | 4:25:24 | 4:15:40 |
| M25-29 | 13 | 4:43:36 | 4:43:36 | 5:00:36 | 5:12:25 | 6:13:20 | 4:43:36 |
| M30-34 | 17 | 5:02:45 | 5:02:45 | 5:10:07 | 5:18:46 | 6:15:16 | 5:02:45 |
| M35-39 | 14 | 4:50:22 | 4:50:22 | 4:58:34 | 5:16:21 | 6:18:50 | 4:50:22 |
| M40-44 | 12 | 5:20:34 | 5:20:34 | 5:28:56 | 5:30:20 | 5:56:20 | 5:20:34 |
| M45-49 | 9 | 4:54:40 | 4:54:40 | 4:54:40 | 5:13:55 | 5:54:16 | 4:54:40 |
| M50-54 | 5 | 5:35:27 | 5:35:27 | 5:35:27 | 5:35:27 | 6:55:10 | 5:35:27 |
Women
| Age group | Finishers | Top 1% | Top 5% | Top 10% | Top 20% | Median | Best |
|---|---|---|---|---|---|---|---|
| All age groups | 23 | 4:42:58 | 5:27:35 | 5:29:40 | 5:56:45 | 6:27:58 | 4:42:58 |
| F35-39 | 6 | 5:29:40 | 5:29:40 | 5:29:40 | 5:48:54 | 5:58:17 | 5:29:40 |
Source: Seffrin A., Nikolaidis P.T., Andrade M.S., Villiger E., Rosemann T., Weiss K., Ferreira D., Knechtle B. (2026). A dataset of 3.6 million IRONMAN triathlon records with transition times (2002-2026), v4.0.0. Zenodo. CC BY 4.0. doi:10.5281/zenodo.23421027.