Age-group thresholds

IRONMAN 70.3 St Croix 2011 · 331 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 240 4:15:50 4:37:31 4:46:24 5:03:31 5:42:18 4:11:43
MPRO 10 4:11:43 4:11:43 4:11:43 4:11:59 4:16:24 4:11:43
M25-29 22 4:29:03 5:00:24 5:01:15 5:07:56 5:28:23 4:29:03
M30-34 40 4:30:50 4:32:57 4:37:31 4:43:16 5:29:26 4:30:50
M35-39 40 4:33:10 4:44:47 4:57:31 5:05:42 5:35:24 4:33:10
M40-44 35 4:44:12 4:45:17 4:48:22 5:04:07 6:12:21 4:44:12
M45-49 38 4:47:20 4:53:35 4:55:51 5:08:06 5:26:19 4:47:20
M50-54 29 4:47:54 4:52:41 4:59:38 5:16:35 5:58:08 4:47:54
M55-59 12 5:21:33 5:21:33 5:24:39 5:26:56 6:27:08 5:21:33
M60-64 8 5:46:13 5:46:13 5:46:13 5:58:31 6:22:30 5:46:13

Women

Age group Finishers Top 1% Top 5% Top 10% Top 20% Median Best
All age groups 91 4:29:28 4:41:33 5:09:23 5:32:13 6:00:09 4:29:28
FPRO 10 4:29:28 4:29:28 4:29:28 4:32:07 4:41:33 4:29:28
F25-29 8 5:07:51 5:07:51 5:07:51 5:35:54 6:08:19 5:07:51
F30-34 10 5:08:16 5:08:16 5:08:16 5:12:10 5:47:37 5:08:16
F35-39 16 5:27:25 5:27:25 5:28:18 5:32:55 5:53:08 5:27:25
F40-44 14 5:19:13 5:19:13 5:32:56 5:41:01 5:54:30 5:19:13
F45-49 9 5:47:04 5:47:04 5:47:04 5:57:51 6:21:31 5:47:04
F50-54 13 5:31:57 5:31:57 5:45:02 5:51:16 6:34:35 5:31:57

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.