| William Ross's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Blue Sky Marathon & Half 2023 (Trail Marathon) | Colorado, US | 39 | Saturday, October 21, 2023 | Not yet started |
| Blue Sky Marathon 2021 (Blue Sky) | Colorado, US | 37 | Saturday, October 16, 2021 | 04:55:55.00 |
| 2021 Golden Gate Dirty 30 (50K) | Colorado, US | 37 | Saturday, June 12, 2021 | 09:26:49.00 |
| Quad Rock 2020 (Quad Rock 25) | Colorado, US | 36 | Saturday, August 15, 2020 | 06:07:49.00 |
| Blue Sky Marathon 2019 (Blue Sky) | Colorado, US | 35 | Saturday, October 19, 2019 | 05:15:08.00 |