Age-group thresholds

IRONMAN 70.3 Buffalo Springs Lake 2008 · 870 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 631 4:10:25 4:31:46 4:44:08 5:07:17 5:49:06 3:58:35
MPRO 16 3:58:35 3:58:35 4:00:09 4:03:38 4:13:59 3:58:35
M18-24 40 4:20:37 4:23:20 4:33:41 4:53:00 5:35:18 4:20:37
M25-29 58 4:19:12 4:27:31 4:39:20 5:11:20 5:41:21 4:19:12
M30-34 95 4:11:01 4:34:36 4:43:50 4:52:54 5:39:51 4:11:01
M35-39 150 4:24:10 4:34:14 4:50:28 5:13:28 5:51:04 4:17:57
M40-44 93 4:25:22 4:38:21 4:47:02 5:02:23 5:34:58 4:25:22
M45-49 85 4:32:28 4:42:45 4:49:33 5:08:34 5:52:26 4:32:28
M50-54 36 4:32:38 4:36:24 4:42:27 5:28:19 6:03:45 4:32:38
M55-59 26 4:59:14 5:12:01 5:15:41 5:27:24 6:21:13 4:59:14
M60-64 13 4:51:56 4:51:56 5:31:16 5:41:42 6:07:51 4:51:56
M65-69 6 5:30:04 5:30:04 5:30:04 5:41:12 6:06:14 5:30:04
MPC 5 5:40:24 5:40:24 5:40:24 5:40:24 5:58:52 5:40:24

Women

Age group Finishers Top 1% Top 5% Top 10% Top 20% Median Best
All age groups 239 4:28:23 4:51:42 5:04:46 5:18:59 6:05:22 4:23:28
FPRO 11 4:23:28 4:23:28 4:27:29 4:28:23 4:43:36 4:23:28
F18-24 18 4:42:29 4:42:29 4:55:18 5:18:49 5:59:03 4:42:29
F25-29 34 4:56:20 5:00:18 5:06:13 5:25:33 5:37:33 4:56:20
F30-34 27 5:06:59 5:12:45 5:13:19 5:36:48 6:27:09 5:06:59
F35-39 38 5:01:30 5:02:10 5:10:50 5:26:02 6:11:41 5:01:30
F40-44 41 4:51:42 5:02:52 5:08:18 5:18:59 6:05:22 4:51:42
F45-49 37 4:50:03 4:55:45 5:13:56 5:26:44 6:07:50 4:50:03
F50-54 18 4:57:29 4:57:29 5:13:23 5:36:14 6:22:00 4:57:29
F55-59 6 5:58:10 5:58:10 5:58:10 6:01:30 6:05:53 5:58:10
F60-64 5 5:54:46 5:54:46 5:54:46 5:54:46 7:22:59 5:54:46

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.