| Event | 2015 Brooks Snowdonia - Marathon |
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| Name | John Marson | Club | SOSPAN RRC | Race Number | 1157 | Date | 24/10/2015 |
| Gender | Male | Gender Position | 293 of 1386 | Category | M40+ | Category Position | 85 of 309 |
| Pen y Pass | 00:37:23 | Stage Position | 252 |
| Halfway | Stage Position | 0 | |
| 23 Miles | 03:08:50 | Stage Position | 306 |
| Gun Time | 03:43:29 | Overall Position | 318 |
| Chip Time | 03:42:48 | Chip Position | 318 |