| Event | 2012 Dublin - Marathon |
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| Name | Gerard O' Brien | Club | Race Number | 4671 | Date | 29/10/2012 | |
| Gender | Male | Gender Position | 545 of 8779 | Category | M55 | Category Position | 9 of 254 |
| to 10K | 00:42:59 | Stage Position | 665 |
| 10K to Half | 00:47:57 | Stage Position | 669 |
| Half to 20Mile | 00:47:26 | Stage Position | 489 |
| Gun Time | 03:05:27 | Overall Position | 571 |
| Chip Time | 03:05:08 | Chip Position | 558 |