| Derek Welch's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| The Bear 100 2025 | Utah, US | 42 | Friday, September 26, 2025 | DNF |
| The Bear 100 2024 | Utah, US | 41 | Friday, September 27, 2024 | DNF |
| The Bear 100 2023 | Utah, US | 40 | Friday, September 29, 2023 | 28:34:48.00 |
| The Bear 100 2022 | Utah, US | 39 | Friday, September 23, 2022 | 29:47:55.00 |
| The Bear 100 2021 | Utah, US | 38 | Saturday, September 25, 2021 | 29:46:41.00 |