| Event | 2012 Dublin - Marathon |
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| Name | Joan O' Brien | Club | Gardai | Race Number | 17785 | Date | 29/10/2012 |
| Gender | Female | Gender Position | 1225 of 3598 | Category | F50 | Category Position | 46 of 209 |
| to 10K | 00:59:52 | Stage Position | 8244 |
| 10K to Half | 01:06:41 | Stage Position | 8221 |
| Half to 20Mile | 01:06:32 | Stage Position | 6783 |
| Gun Time | 04:13:00 | Overall Position | 6898 |
| Chip Time | 04:12:41 | Chip Position | 6928 |