| Alex Liethen's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Never Summer 100k (2024) (100k) | Colorado, US | 41 | Saturday, July 27, 2024 | 16:12:36.00 |
| Never Summer 100k (2023) | Colorado, US | 40 | Saturday, July 29, 2023 | Not yet started |
| Blue Sky Marathon 2022 (Blue Sky) | Colorado, US | 39 | Saturday, October 15, 2022 | 04:07:43.00 |
| Never Summer (2022) (60k) | Colorado, US | 39 | Friday, July 29, 2022 | 08:36:07.00 |