| Event | 2012 Dublin - Marathon |
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| Name | Grainne O' Mahony | Club | Race Number | 13367 | Date | 29/10/2012 | |
| Gender | Female | Gender Position | 3323 of 3598 | Category | F50 | Category Position | 183 of 209 |
| to 10K | 01:16:12 | Stage Position | 11480 |
| 10K to Half | 01:40:31 | Stage Position | 11837 |
| Half to 20Mile | 01:46:58 | Stage Position | 11754 |
| Gun Time | 06:21:07 | Overall Position | 11830 |
| Chip Time | 06:20:13 | Chip Position | 11720 |