| Event | 2012 Dublin - Marathon |
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| Name | John Byrne | Club | Mayo ac | Race Number | 3915 | Date | 29/10/2012 |
| Gender | Male | Gender Position | 39 of 8779 | Category | M35 | Category Position | 7 of 2079 |
| to 10K | 00:37:04 | Stage Position | 39 |
| 10K to Half | 00:41:58 | Stage Position | 64 |
| Half to 20Mile | 00:41:30 | Stage Position | 60 |
| Gun Time | 02:37:24 | Overall Position | 47 |
| Chip Time | 02:37:23 | Chip Position | 47 |