| Event | 2013 Airtricity Dublin - Marathon |
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| Name | Thomas O' Brien | Club | Race Number | 13925 | Date | 28/10/2013 | |
| Gender | Male | Gender Position | 8169 of 8666 | Category | M40 | Category Position | 1713 of 1790 |
| 10K | 01:04:01 | Stage Position | 10100 |
| Half | 02:17:34 | Stage Position | 10268 |
| 20Mile | 03:54:00 | Stage Position | 11024 |
| Gun Time | 05:27:05 | Overall Position | 11236 |
| Chip Time | 05:26:07 | Chip Position | 11201 |