| Event | 2013 Airtricity Dublin - Marathon |
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| Name | Geoff Duff | Club | Skerries AC | Race Number | 3652 | Date | 28/10/2013 |
| Gender | Male | Gender Position | 519 of 8666 | Category | M40 | Category Position | 105 of 1790 |
| 10K | 00:43:30 | Stage Position | 745 |
| Half | 01:31:22 | Stage Position | 706 |
| 20Mile | 02:19:58 | Stage Position | 618 |
| Gun Time | 03:07:09 | Overall Position | 536 |
| Chip Time | 03:06:31 | Chip Position | 526 |