| Michael Harkin's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Old West Trail Runs 2025 (50K) | California, US | 50 | Saturday, March 15, 2025 | 06:07:32.00 |
| ABC 50 (Anza Borrego Cuyamaca 50) (50 Miler) | California, US | 50 | Saturday, December 7, 2024 | 12:42:00.00 |
| Pacific Crest Trail 50 -2024 (PCT 50) (50 miler) | California, US | 50 | Saturday, May 11, 2024 | 13:41:42.00 |
| PCT 50 (Pacific Crest Trail 50) | California, US | 49 | Saturday, May 13, 2023 | DNF |
| Oriflamme 50k 2023 | California, US | 48 | Saturday, April 15, 2023 | 06:56:56.00 |