| Event | 2016 Brooks Snowdonia - Marathon |
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| Name | Gwion Williams | Club | ERYRI HARRIERS | Race Number | 2049 | Date | 29/10/2016 |
| Gender | Male | Gender Position | 145 of 1515 | Category | M40 | Category Position | 29 of 312 |
| Pen y Pass | 00:37:01 | Stage Position | 223 |
| Halfway | 01:36:33 | Stage Position | 169 |
| 23 Miles | 02:58:57 | Stage Position | 178 |
| Gun Time | 03:28:25 | Overall Position | 156 |
| Chip Time | 03:27:46 | Chip Position | 156 |