Age-group thresholds
IRONMAN 70.3 Michigan · 5 editions (2021, 2022, 2023, 2024, 2025) · 9,398 finishers
Editions: 2021 · 2022 · 2023 · 2024 · 2025
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 | 6,574 | 4:04:20 | 4:36:45 | 4:53:21 | 5:14:13 | 5:53:21 | 3:36:48 |
| MPRO | 67 | 3:36:48 | 3:40:13 | 3:43:26 | 3:49:32 | 3:56:46 | 3:36:48 |
| M18-24 | 386 | 4:16:02 | 4:28:47 | 4:47:11 | 5:09:22 | 5:46:18 | 4:08:39 |
| M25-29 | 800 | 4:08:28 | 4:25:47 | 4:40:15 | 5:03:53 | 5:45:47 | 4:01:14 |
| M30-34 | 931 | 4:13:10 | 4:35:03 | 4:50:38 | 5:11:41 | 5:51:10 | 4:02:32 |
| M35-39 | 934 | 4:17:03 | 4:34:52 | 4:47:42 | 5:09:31 | 5:44:17 | 4:01:29 |
| M40-44 | 921 | 4:18:52 | 4:40:02 | 4:55:12 | 5:11:42 | 5:49:46 | 4:01:18 |
| M45-49 | 721 | 4:28:25 | 4:43:58 | 4:57:35 | 5:16:27 | 5:49:53 | 4:10:05 |
| M50-54 | 739 | 4:34:36 | 4:52:23 | 5:06:49 | 5:22:53 | 5:55:23 | 4:13:53 |
| M55-59 | 582 | 4:38:59 | 5:03:10 | 5:15:16 | 5:36:16 | 6:07:59 | 4:28:12 |
| M60-64 | 313 | 4:58:27 | 5:12:19 | 5:30:39 | 5:41:35 | 6:21:52 | 4:47:26 |
| M65-69 | 140 | 5:14:08 | 5:21:05 | 5:30:13 | 5:52:01 | 6:42:23 | 5:01:25 |
| M70-74 | 31 | 5:52:54 | 5:54:15 | 5:56:16 | 6:37:08 | 7:15:48 | 5:52:54 |
| M75-79 | 8 | 6:48:57 | 6:48:57 | 6:48:57 | 6:48:57 | 7:17:45 | 6:48:57 |
Women
| Age group | Finishers | Top 1% | Top 5% | Top 10% | Top 20% | Median | Best |
|---|---|---|---|---|---|---|---|
| All age groups | 2,824 | 4:31:31 | 5:01:18 | 5:18:48 | 5:40:09 | 6:23:41 | 4:05:05 |
| FPRO | 36 | 4:05:05 | 4:08:36 | 4:12:39 | 4:16:49 | 4:26:10 | 4:05:05 |
| F18-24 | 125 | 4:54:34 | 5:10:01 | 5:24:53 | 5:38:26 | 6:10:50 | 4:38:49 |
| F25-29 | 332 | 4:42:20 | 4:52:45 | 5:11:43 | 5:31:36 | 6:09:17 | 4:29:55 |
| F30-34 | 331 | 4:36:08 | 4:57:41 | 5:06:21 | 5:25:38 | 6:05:52 | 4:27:56 |
| F35-39 | 343 | 4:44:30 | 5:00:32 | 5:11:40 | 5:34:49 | 6:19:51 | 4:31:24 |
| F40-44 | 487 | 4:42:39 | 5:01:50 | 5:15:50 | 5:35:54 | 6:14:42 | 4:31:29 |
| F45-49 | 393 | 4:59:58 | 5:18:15 | 5:29:50 | 5:42:22 | 6:28:04 | 4:44:32 |
| F50-54 | 304 | 4:54:54 | 5:14:33 | 5:37:03 | 6:00:45 | 6:37:23 | 4:50:05 |
| F55-59 | 256 | 5:12:58 | 5:33:39 | 5:43:04 | 6:05:53 | 6:49:24 | 5:01:48 |
| F60-64 | 142 | 5:25:04 | 5:42:08 | 5:54:05 | 6:13:09 | 6:56:51 | 5:19:23 |
| F65-69 | 53 | 5:54:33 | 6:05:36 | 6:13:12 | 6:39:44 | 7:23:08 | 5:54:33 |
| F70-74 | 20 | 5:53:58 | 5:53:58 | 6:01:55 | 6:44:29 | 7:38:47 | 5:53:58 |
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.