| Event | 2017 Brooks Snowdonia - Marathon |
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| Name | Gwion Williams | Club | ERYRI HARRIERS | Race Number | 2103 | Date | 28/10/2017 |
| Gender | Male | Gender Position | 192 of 1596 | Category | MV40 | Category Position | 43 of 304 |
| Pen-y-Pass | 00:37:35 | Stage Position | 239 |
| 14Miles | 01:46:24 | Stage Position | 206 |
| 23Miles | 03:04:49 | Stage Position | 215 |
| Gun Time | 03:36:09 | Overall Position | 205 |
| Chip Time | 03:35:47 | Chip Position | 208 |