| Event | 2012 Dublin - Marathon |
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| Name | Gemma Brennan | Club | Race Number | 15936 | Date | 29/10/2012 | |
| Gender | Female | Gender Position | 1489 of 3598 | Category | F35 | Category Position | 345 of 739 |
| to 10K | 01:00:12 | Stage Position | 8438 |
| 10K to Half | 01:06:49 | Stage Position | 8308 |
| Half to 20Mile | 01:08:45 | Stage Position | 7502 |
| Gun Time | 04:19:05 | Overall Position | 7589 |
| Chip Time | 04:19:05 | Chip Position | 7600 |