| Cynthia Bass's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Never Summer 60k (2025) | Colorado, US | 49 | Friday, July 25, 2025 | 11:38:14.00 |
| Red Feather Trail Jamboree 2023 50 Mile | Colorado, US | 47 | Saturday, September 23, 2023 | 15:05:20.00 |
| Quad Rock 2023 (Quad Rock 50) | Colorado, US | 47 | Saturday, May 6, 2023 | DNF |
| Blue Sky Marathon 2022 (Blue Sky) | Colorado, US | 46 | Saturday, October 15, 2022 | 06:18:27.00 |
| Red Feather Trail Jamboree 2022 (50K) | Colorado, US | 46 | Saturday, September 17, 2022 | 07:41:34.00 |