| Greg Opgenorth's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Quad Rock 2025 (Quad Rock 50) | Colorado, US | 44 | Saturday, May 10, 2025 | 13:35:43.00 |
| Quad Rock 2024 (Quad Rock 50) | Colorado, US | 43 | Saturday, May 11, 2024 | DNF |
| Never Summer (2022) (60k) | Colorado, US | 42 | Friday, July 29, 2022 | 11:51:01.00 |
| Never Summer (2021) (100k) | Colorado, US | 41 | Saturday, July 31, 2021 | 21:43:42.00 |