| Event | 2015 Brooks Snowdonia - Marathon |
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| Name | Sian Williams | Club | Race Number | 2675 | Date | 24/10/2015 | |
| Gender | Female | Gender Position | 36 of 497 | Category | FOPEN | Category Position | 20 of 182 |
| Pen y Pass | 00:39:25 | Stage Position | 425 |
| Halfway | Stage Position | 0 | |
| 23 Miles | 03:13:47 | Stage Position | 390 |
| Gun Time | 03:49:03 | Overall Position | 390 |
| Chip Time | 03:46:18 | Chip Position | 370 |