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.