| Event | 2013 Airtricity Dublin - Marathon |
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| Name | Justin O' Brien | Club | Race Number | 16641 | Date | 28/10/2013 | |
| Gender | Male | Gender Position | 1221 of 8666 | Category | M35 | Category Position | 344 of 2039 |
| 10K | 00:43:40 | Stage Position | 761 |
| Half | 01:33:35 | Stage Position | 844 |
| 20Mile | 02:29:28 | Stage Position | 1198 |
| Gun Time | 03:21:59 | Overall Position | 1294 |
| Chip Time | 03:21:40 | Chip Position | 1332 |