| Donald Harriss's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Quad Rock 2021 (Quad Rock 25) | Colorado, US | 39 | Saturday, May 8, 2021 | 05:46:37.00 |
| Blue Sky Marathon 2019 (Blue Sky) | Colorado, US | 38 | Saturday, October 19, 2019 | 05:50:39.00 |
| Donald Harriss's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Quad Rock 2021 (Quad Rock 25) | Colorado, US | 39 | Saturday, May 8, 2021 | 05:46:37.00 |
| Blue Sky Marathon 2019 (Blue Sky) | Colorado, US | 38 | Saturday, October 19, 2019 | 05:50:39.00 |