| Thomas Knutson's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Hardrock 100 2006 | Minnesota, US | 56 | Friday, July 14, 2006 | DNF |
| Hardrock 100 2005 | Minnesota, US | 55 | Friday, July 8, 2005 | 46:55:10.00 |
| Hardrock 100 2004 | Minnesota, US | 54 | Friday, July 9, 2004 | 43:10:45.00 |
| Hardrock 100 2003 | Minnesota, US | 53 | Friday, July 11, 2003 | DNF |
| Hardrock 100 2001 | Minnesota, US | 51 | Friday, July 13, 2001 | 39:56:28.00 |
| Hardrock 100 1994 | Minnesota, US | 43 | Friday, July 8, 1994 | DNF |
| Hardrock 100 1992 | Minnesota, US | 41 | Friday, July 10, 1992 | 42:26:00.00 |