| Event | 2017 Brooks Snowdonia - Marathon |
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| Name | Gwyndaf Williams | Club | BETSI RUNAWAYS | Race Number | 2104 | Date | 28/10/2017 |
| Gender | Male | Gender Position | 1436 of 1596 | Category | MV40 | Category Position | 285 of 304 |
| Pen-y-Pass | 00:54:53 | Stage Position | 2032 |
| 14Miles | 02:38:32 | Stage Position | 1956 |
| 23Miles | 04:37:20 | Stage Position | 1931 |
| Gun Time | 05:35:46 | Overall Position | 1964 |
| Chip Time | 05:32:19 | Chip Position | 1953 |