Age-group thresholds
IRONMAN 70.3 Michigan · 6 editions (2021, 2022, 2023, 2024, 2025, 2026) · 11,277 finishers
Editions: 2021 · 2022 · 2023 · 2024 · 2025 · 2026
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 | 7,862 | 4:06:06 | 4:38:05 | 4:54:11 | 5:14:58 | 5:54:23 | 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 | 589 | 4:14:15 | 4:28:54 | 4:49:16 | 5:08:38 | 5:49:42 | 4:06:11 |
| M25-29 | 1,030 | 4:11:56 | 4:30:38 | 4:46:02 | 5:07:19 | 5:49:10 | 4:01:14 |
| M30-34 | 1,140 | 4:09:49 | 4:35:03 | 4:50:51 | 5:12:09 | 5:52:38 | 3:52:36 |
| M35-39 | 1,102 | 4:15:35 | 4:35:45 | 4:48:48 | 5:10:23 | 5:46:57 | 3:56:45 |
| M40-44 | 1,060 | 4:18:19 | 4:40:02 | 4:55:37 | 5:12:05 | 5:50:13 | 4:01:18 |
| M45-49 | 816 | 4:29:12 | 4:44:01 | 4:57:18 | 5:15:47 | 5:48:53 | 4:10:05 |
| M50-54 | 828 | 4:34:36 | 4:53:21 | 5:05:27 | 5:21:49 | 5:55:38 | 4:13:53 |
| M55-59 | 660 | 4:37:16 | 4:59:28 | 5:13:00 | 5:36:01 | 6:08:31 | 4:28:12 |
| M60-64 | 357 | 4:58:27 | 5:12:19 | 5:29:06 | 5:42:08 | 6:21:52 | 4:47:26 |
| M65-69 | 165 | 5:11:29 | 5:21:54 | 5:34:48 | 5:52:04 | 6:41:07 | 5:01:25 |
| M70-74 | 37 | 5:52:54 | 5:54:15 | 5:56:16 | 6:37:12 | 7:23:11 | 5:52:54 |
| M75-79 | 9 | 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 | 3,415 | 4:36:08 | 5:03:22 | 5:20:33 | 5:41:05 | 6:24:41 | 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 | 200 | 4:50:12 | 5:15:59 | 5:29:16 | 5:43:54 | 6:15:36 | 4:38:49 |
| F25-29 | 447 | 4:42:20 | 4:56:53 | 5:17:24 | 5:36:55 | 6:11:18 | 4:25:09 |
| F30-34 | 425 | 4:37:03 | 4:58:11 | 5:10:50 | 5:28:31 | 6:12:27 | 4:27:56 |
| F35-39 | 427 | 4:46:25 | 5:01:10 | 5:11:40 | 5:35:00 | 6:19:57 | 4:31:24 |
| F40-44 | 549 | 4:42:43 | 5:01:44 | 5:14:01 | 5:34:49 | 6:14:42 | 4:31:29 |
| F45-49 | 446 | 4:56:40 | 5:18:15 | 5:28:07 | 5:41:09 | 6:27:19 | 4:44:32 |
| F50-54 | 341 | 4:54:54 | 5:14:33 | 5:35:05 | 5:56:50 | 6:36:15 | 4:50:05 |
| F55-59 | 296 | 5:10:49 | 5:32:30 | 5:43:04 | 6:02:45 | 6:49:52 | 5:01:48 |
| F60-64 | 159 | 5:25:04 | 5:39:15 | 5:47:02 | 6:13:09 | 6:56:51 | 5:19:23 |
| F65-69 | 63 | 5:35:06 | 6:02:23 | 6:12:41 | 6:31:05 | 7:22:18 | 5:35:06 |
| F70-74 | 23 | 5:53:58 | 5:54:00 | 6:01:55 | 6:44:29 | 7:27:22 | 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 3.6 million IRONMAN triathlon records with transition times (2002-2026), v4.0.0. Zenodo. CC BY 4.0. doi:10.5281/zenodo.23421027.