Age-group thresholds
IRONMAN 70.3 Bolton · 3 editions (2021, 2024, 2025) · 3,403 finishers
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 | 2,805 | 4:19:56 | 4:46:09 | 5:00:22 | 5:20:40 | 5:58:03 | 4:02:50 |
| M18-24 | 234 | 4:14:07 | 4:35:59 | 4:59:41 | 5:16:41 | 5:54:49 | 4:06:52 |
| M25-29 | 349 | 4:17:41 | 4:41:24 | 4:58:09 | 5:16:09 | 5:53:13 | 4:02:54 |
| M30-34 | 491 | 4:17:26 | 4:36:23 | 4:50:39 | 5:12:50 | 5:52:35 | 4:02:50 |
| M35-39 | 466 | 4:19:30 | 4:40:16 | 4:53:09 | 5:19:37 | 5:55:51 | 4:12:04 |
| M40-44 | 407 | 4:22:16 | 4:49:38 | 4:58:49 | 5:20:43 | 5:59:55 | 4:17:41 |
| M45-49 | 309 | 4:33:22 | 4:50:17 | 5:06:46 | 5:22:42 | 6:00:37 | 4:07:37 |
| M50-54 | 296 | 4:33:38 | 4:54:12 | 5:08:34 | 5:28:05 | 6:13:24 | 4:25:41 |
| M55-59 | 156 | 4:54:10 | 5:05:03 | 5:18:01 | 5:31:40 | 6:10:42 | 4:51:49 |
| M60-64 | 65 | 5:02:38 | 5:11:42 | 5:25:05 | 5:36:24 | 6:21:04 | 5:02:38 |
| M65-69 | 22 | 5:32:56 | 5:38:24 | 5:46:29 | 6:00:12 | 7:00:14 | 5:32:56 |
| M70-74 | 7 | 5:58:27 | 5:58:27 | 5:58:27 | 7:02:55 | 7:09:40 | 5:58:27 |
Women
| Age group | Finishers | Top 1% | Top 5% | Top 10% | Top 20% | Median | Best |
|---|---|---|---|---|---|---|---|
| All age groups | 598 | 4:47:57 | 5:09:29 | 5:22:15 | 5:43:56 | 6:27:05 | 4:40:48 |
| F18-24 | 64 | 4:51:17 | 5:11:41 | 5:29:15 | 5:45:41 | 6:31:23 | 4:51:17 |
| F25-29 | 103 | 4:44:16 | 5:00:31 | 5:04:04 | 5:40:51 | 6:16:52 | 4:40:48 |
| F30-34 | 102 | 4:43:05 | 4:59:35 | 5:11:42 | 5:24:57 | 6:07:29 | 4:42:03 |
| F35-39 | 63 | 5:09:29 | 5:13:26 | 5:22:15 | 5:41:13 | 6:31:58 | 5:09:29 |
| F40-44 | 84 | 4:53:38 | 5:16:58 | 5:33:45 | 5:45:09 | 6:29:19 | 4:53:38 |
| F45-49 | 80 | 5:08:00 | 5:16:42 | 5:33:00 | 5:52:27 | 6:34:39 | 5:08:00 |
| F50-54 | 53 | 5:13:01 | 5:33:23 | 5:39:36 | 6:02:46 | 6:58:30 | 5:13:01 |
| F55-59 | 37 | 5:15:01 | 5:25:21 | 5:29:51 | 5:45:43 | 6:23:14 | 5:15:01 |
| F60-64 | 9 | 6:22:40 | 6:22:40 | 6:22:40 | 6:26:15 | 7:23:04 | 6:22:40 |
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.