| Event | 2012 Trail Marathon Wales - Half Marathon |
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| Name | Gwion Williams | Club | Eryri | Race Number | 1395 | Date | 23/06/2012 |
| Gender | Male | Gender Position | 29 of 163 | Category | MOPEN | Category Position | 19 of 83 |
| Gun Time | 01:52:23 | Overall Position | 30 |
| Chip Time | 01:52:16 | Chip Position | 30 |