| Event | 2013 Airtricity Dublin - Marathon |
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| Name | William O' Brien | Club | Race Number | 2531 | Date | 28/10/2013 | |
| Gender | Male | Gender Position | 2989 of 8666 | Category | MS | Category Position | 894 of 2562 |
| 10K | 00:49:19 | Stage Position | 2698 |
| Half | 01:44:58 | Stage Position | 2945 |
| 20Mile | 02:45:00 | Stage Position | 3142 |
| Gun Time | 03:45:19 | Overall Position | 3328 |
| Chip Time | 03:43:37 | Chip Position | 3322 |