Age-group thresholds
IRONMAN 70.3 Western Massachusetts · 4 editions (2023, 2024, 2025, 2026) · 4,563 finishers
Editions: 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 | 3,367 | 3:47:01 | 4:09:45 | 4:21:59 | 4:42:11 | 5:25:30 | 3:30:03 |
| M18-24 | 304 | 3:51:10 | 4:03:17 | 4:22:42 | 4:40:19 | 5:23:26 | 3:30:03 |
| M25-29 | 476 | 3:43:08 | 4:00:05 | 4:14:39 | 4:35:45 | 5:17:22 | 3:30:19 |
| M30-34 | 485 | 3:44:34 | 3:58:54 | 4:12:12 | 4:29:54 | 5:15:57 | 3:36:33 |
| M35-39 | 431 | 3:40:33 | 4:05:45 | 4:13:30 | 4:31:40 | 5:20:52 | 3:30:14 |
| M40-44 | 396 | 3:44:08 | 4:06:23 | 4:17:21 | 4:39:07 | 5:25:07 | 3:36:42 |
| M45-49 | 391 | 3:54:27 | 4:18:03 | 4:26:24 | 4:47:56 | 5:21:42 | 3:50:29 |
| M50-54 | 355 | 4:05:25 | 4:25:23 | 4:38:40 | 4:52:39 | 5:33:24 | 3:45:23 |
| M55-59 | 261 | 4:12:14 | 4:28:22 | 4:35:02 | 4:56:51 | 5:39:38 | 4:01:58 |
| M60-64 | 174 | 4:14:44 | 4:31:21 | 4:51:53 | 5:04:09 | 5:50:59 | 4:12:50 |
| M65-69 | 60 | 4:30:18 | 4:41:30 | 5:04:39 | 5:26:34 | 6:07:51 | 4:30:18 |
| M70-74 | 25 | 4:42:57 | 5:09:09 | 5:38:07 | 5:39:04 | 6:24:25 | 4:42:57 |
| M75-79 | 6 | 6:12:56 | 6:12:56 | 6:12:56 | 6:26:24 | 6:42:23 | 6:12:56 |
Women
| Age group | Finishers | Top 1% | Top 5% | Top 10% | Top 20% | Median | Best |
|---|---|---|---|---|---|---|---|
| All age groups | 1,196 | 4:15:13 | 4:36:24 | 4:51:22 | 5:09:07 | 5:54:14 | 3:59:01 |
| F18-24 | 92 | 4:21:28 | 4:36:24 | 4:51:25 | 5:08:50 | 5:53:20 | 4:21:28 |
| F25-29 | 176 | 4:12:19 | 4:31:37 | 4:44:33 | 4:59:46 | 5:40:06 | 4:11:16 |
| F30-34 | 160 | 4:17:15 | 4:41:05 | 4:51:39 | 5:09:22 | 5:53:08 | 4:13:11 |
| F35-39 | 138 | 4:04:03 | 4:21:46 | 4:38:21 | 4:55:14 | 5:40:22 | 3:59:01 |
| F40-44 | 168 | 4:03:54 | 4:32:13 | 4:44:08 | 5:03:54 | 5:45:16 | 4:03:33 |
| F45-49 | 149 | 4:15:13 | 4:34:40 | 4:42:38 | 5:07:15 | 5:47:00 | 4:10:37 |
| F50-54 | 143 | 4:31:36 | 4:50:28 | 5:02:18 | 5:20:35 | 6:00:46 | 4:24:58 |
| F55-59 | 92 | 4:30:35 | 4:50:56 | 5:11:04 | 5:39:21 | 6:21:42 | 4:30:35 |
| F60-64 | 50 | 4:42:09 | 5:02:35 | 5:10:37 | 5:28:02 | 6:24:28 | 4:42:09 |
| F65-69 | 19 | 4:57:06 | 4:57:06 | 5:13:53 | 5:28:38 | 6:41:49 | 4:57:06 |
| F70-74 | 7 | 5:09:20 | 5:09:20 | 5:09:20 | 5:40:42 | 6:01:43 | 5:09:20 |
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.