| James Williamson's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Never Summer (2020) (100k) | Colorado, US | 29 | Saturday, July 25, 2020 | 12:55:03.00 |
| Quad Rock (2019) (Quad Rock 50) | Colorado, US | 28 | Saturday, May 11, 2019 | 10:25:56.00 |
| James Williamson's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Never Summer (2020) (100k) | Colorado, US | 29 | Saturday, July 25, 2020 | 12:55:03.00 |
| Quad Rock (2019) (Quad Rock 50) | Colorado, US | 28 | Saturday, May 11, 2019 | 10:25:56.00 |