| Event | 2012 Dublin - Marathon |
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| Name | Justin O' Brien | Club | Race Number | 4306 | Date | 29/10/2012 | |
| Gender | Male | Gender Position | 567 of 8779 | Category | M35 | Category Position | 145 of 2079 |
| to 10K | Stage Position | 0 | |
| 10K to Half | 00:47:33 | Stage Position | 540 |
| Half to 20Mile | 00:48:19 | Stage Position | 582 |
| Gun Time | 03:06:09 | Overall Position | 595 |
| Chip Time | Chip Position | 0 |