| John Trefethen's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Quad Rock 2022 (Quad Rock 25) | Colorado, US | 51 | Saturday, May 7, 2022 | 06:06:34.00 |
| Staunton Rocks! Marathon & Half (Half Marathon) | Colorado, US | 50 | Saturday, August 28, 2021 | 02:14:14.00 |
| John Trefethen's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Quad Rock 2022 (Quad Rock 25) | Colorado, US | 51 | Saturday, May 7, 2022 | 06:06:34.00 |
| Staunton Rocks! Marathon & Half (Half Marathon) | Colorado, US | 50 | Saturday, August 28, 2021 | 02:14:14.00 |