| William Rideg's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| The Bear 100 2019 | Montana, US | 53 | Friday, September 27, 2019 | DNF |
| The Bear 100 2018 | Montana, US | 52 | Friday, September 28, 2018 | 34:23:45.00 |
| The Bear 100 2016 | Montana, US | 50 | Friday, September 23, 2016 | DNF |
| The Bear 100 2013 | Montana, US | 47 | Friday, September 27, 2013 | DNF |
| Hardrock 100 2010 | Montana, US | 44 | Friday, July 9, 2010 | DNF |
| The Bear 100 2009 | Montana, US | 43 | Friday, September 25, 2009 | 33:08:00.00 |
| Hardrock 100 2006 | Montana, US | 41 | Friday, July 14, 2006 | DNF |
| Hardrock 100 2005 | Montana, US | 40 | Friday, July 8, 2005 | DNF |
| Hardrock 100 2004 | Montana, US | 39 | Friday, July 9, 2004 | 38:08:14.00 |
| Hardrock 100 2003 | Montana, US | 38 | Friday, July 11, 2003 | 42:01:38.00 |
| Hardrock 100 2001 | Montana, US | 36 | Friday, July 13, 2001 | DNF |
| Hardrock 100 2000 | Friday, July 7, 2000 | DNF |