| Event | 2010 Snowdonia - Marathon |
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| Name | Gwion Williams | Club | Eryri Harriers | Race Number | 1798 | Date | 30/10/2010 |
| Gender | Male | Gender Position | 291 of 1047 | Category | MOPEN | Category Position | 140 of 494 |
| Gun Time | 03:51:12 | Overall Position | 318 |
| Chip Time | 03:50:29 | Chip Position | 320 |