| Event | 2012 Dublin - Marathon |
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| Name | Mary O' Brien | Club | Race Number | 14660 | Date | 29/10/2012 | |
| Gender | Female | Gender Position | 2554 of 3598 | Category | F40 | Category Position | 469 of 653 |
| to 10K | 01:01:39 | Stage Position | 8978 |
| 10K to Half | 01:12:09 | Stage Position | 9944 |
| Half to 20Mile | 01:22:32 | Stage Position | 10240 |
| Gun Time | 04:56:47 | Overall Position | 10194 |
| Chip Time | 04:56:40 | Chip Position | 10161 |