| Event | 2013 Airtricity Dublin - Marathon |
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| Name | Grainne Costello | Club | Race Number | 8929 | Date | 28/10/2013 | |
| Gender | Female | Gender Position | 3273 of 3684 | Category | F50 | Category Position | 194 of 242 |
| 10K | 01:10:56 | Stage Position | 11525 |
| Half | 02:35:50 | Stage Position | 11565 |
| 20Mile | 04:16:18 | Stage Position | 11631 |
| Gun Time | 05:47:14 | Overall Position | 11626 |
| Chip Time | 05:45:45 | Chip Position | 11572 |