Age-group thresholds

IRONMAN 70.3 Costa Rica 2018 · 1,050 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 822 4:16:27 4:51:44 5:05:22 5:25:31 6:00:34 3:49:59
MPRO 14 3:49:59 3:49:59 3:50:57 3:54:26 4:12:31 3:49:59
M18-24 14 4:36:38 4:36:38 4:37:51 4:52:26 5:33:58 4:36:38
M25-29 67 4:46:33 4:56:13 5:02:46 5:15:48 5:42:31 4:46:33
M30-34 161 4:32:21 4:51:38 5:06:55 5:23:48 6:00:05 4:23:27
M35-39 201 4:25:21 4:51:44 5:05:22 5:30:10 5:57:46 4:23:26
M40-44 171 4:49:45 5:01:51 5:16:58 5:30:35 5:59:05 4:44:57
M45-49 93 4:37:42 4:52:13 5:12:05 5:27:30 6:06:37 4:37:42
M50-54 59 4:51:17 4:59:03 5:12:49 5:32:54 6:10:30 4:51:17
M55-59 25 5:03:14 5:06:06 5:18:25 5:43:36 6:42:56 5:03:14
M60-64 11 6:08:41 6:08:41 6:09:41 6:15:39 6:40:00 6:08:41
M65-69 5 6:32:25 6:32:25 6:32:25 6:32:25 6:44:22 6:32:25

Women

Age group Finishers Top 1% Top 5% Top 10% Top 20% Median Best
All age groups 228 4:44:26 5:11:01 5:28:19 5:56:30 6:30:54 4:29:15
F18-24 7 5:37:11 5:37:11 5:37:11 6:06:21 6:49:33 5:37:11
F25-29 28 5:08:31 5:26:18 5:38:31 6:01:25 6:38:04 5:08:31
F30-34 46 5:03:49 5:11:41 5:22:07 5:52:55 6:28:38 5:03:49
F35-39 52 4:53:20 5:08:15 5:27:15 5:50:13 6:31:49 4:53:20
F40-44 46 5:07:44 5:29:31 5:43:46 5:52:22 6:20:53 5:07:44
F45-49 26 5:25:15 5:33:59 5:59:21 6:08:57 6:32:47 5:25:15
F50-54 10 5:28:19 5:28:19 5:28:19 5:53:00 6:13:40 5:28:19
F55-59 8 5:45:37 5:45:37 5:45:37 5:58:36 6:28:12 5:45:37

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.