| Kenneth Lonnquist's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Staunton Rocks! Marathon & Half 2025 (Marathon) | Colorado, US | 41 | Saturday, August 23, 2025 | 08:15:36.00 |
| Blue Sky Marathon & Half 2024 (Trail Half Marathon) | Colorado, US | 40 | Saturday, October 19, 2024 | 02:57:05.00 |