| Event | 2012 Snowdonia - Marathon |
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| Name | Gwion Williams | Club | Eryri Harriers | Race Number | 1769 | Date | 27/10/2012 |
| Gender | Male | Gender Position | 252 of 1212 | Category | MOPEN | Category Position | 131 of 499 |
| Half Marathon | 01:41:32 | Stage Position | 279 |
| Gun Time | 03:43:10 | Overall Position | 269 |
| Chip Time | 03:43:00 | Chip Position | 271 |