| Event | 2013 Airtricity Dublin - Marathon |
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| Name | John Williams | Club | Race Number | 3100 | Date | 28/10/2013 | |
| Gender | Male | Gender Position | 1786 of 8666 | Category | M40 | Category Position | 407 of 1790 |
| 10K | 00:49:18 | Stage Position | 2690 |
| Half | 01:44:31 | Stage Position | 2688 |
| 20Mile | 02:39:24 | Stage Position | 2384 |
| Gun Time | 03:30:23 | Overall Position | 1918 |
| Chip Time | 03:29:05 | Chip Position | 1892 |