| Event | 2021 ABP Newport Wales - Marathon |
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| Name | Shelley O'Callaghan | Club | BITTON ROAD RUNNERS | Race Number | 4157 | Date | 24/10/2021 |
| Gender | Female | Gender Position | 438 of 586 | Category | F55+ | Category Position | 33 of 51 |
| 5K | 00:32:14 | Stage Position | 1812 |
| 10K | 01:04:47 | Stage Position | 1816 |
| 10 Mile | 01:44:49 | Stage Position | 1802 |
| Halfway | 02:18:38 | Stage Position | 1771 |
| 15 Mile | 02:42:59 | Stage Position | 1773 |
| 21 Mile | 03:54:17 | Stage Position | 1748 |
| 23 Mile | 04:18:37 | Stage Position | 1725 |
| Gun Time | 05:01:40 | Overall Position | 1754 |
| Chip Time | 04:58:46 | Chip Position | 1749 |