| Rex Mullins's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2026 Running Up For Air (Ogden) (6H) | Utah, US | 40 | Saturday, February 28, 2026 | Not yet started |
| 2025 DC Peaks (50 Miler) | Utah, US | 39 | Saturday, October 4, 2025 | 14:36:00.00 |
| Rex Mullins's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2026 Running Up For Air (Ogden) (6H) | Utah, US | 40 | Saturday, February 28, 2026 | Not yet started |
| 2025 DC Peaks (50 Miler) | Utah, US | 39 | Saturday, October 4, 2025 | 14:36:00.00 |