| Event | 2013 Airtricity Dublin - Marathon |
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| Name | Mark Grennan | Club | Race Number | 3473 | Date | 28/10/2013 | |
| Gender | Male | Gender Position | 1791 of 8666 | Category | M40 | Category Position | 408 of 1790 |
| 10K | 00:48:15 | Stage Position | 2104 |
| Half | 01:41:41 | Stage Position | 2063 |
| 20Mile | 02:35:59 | Stage Position | 1884 |
| Gun Time | 03:30:23 | Overall Position | 1923 |
| Chip Time | 03:27:27 | Chip Position | 1697 |