| John Clarke's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2022 Running Up For Air (SLC) (24H) | Colorado, US | 56 | Saturday, February 5, 2022 | 23:02:42.00 |
| Never Summer (2020) (100k) | Colorado, US | 55 | Saturday, July 25, 2020 | 20:43:32.00 |
| John Clarke's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2022 Running Up For Air (SLC) (24H) | Colorado, US | 56 | Saturday, February 5, 2022 | 23:02:42.00 |
| Never Summer (2020) (100k) | Colorado, US | 55 | Saturday, July 25, 2020 | 20:43:32.00 |