| Event | 2015 Brooks Snowdonia - Marathon |
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| Name | Simon Grigg-Williams | Club | Race Number | 704 | Date | 24/10/2015 | |
| Gender | Male | Gender Position | 1025 of 1386 | Category | M45+ | Category Position | 199 of 262 |
| Pen y Pass | 00:44:55 | Stage Position | 1010 |
| Halfway | 02:01:23 | Stage Position | 776 |
| 23 Miles | 04:04:06 | Stage Position | 1310 |
| Gun Time | 04:44:43 | Overall Position | 1241 |
| Chip Time | 04:43:57 | Chip Position | 1256 |