| Bob Combs's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Hardrock 100 2016 | Colorado, US | 49 | Friday, July 15, 2016 | DNF |
| Hardrock 100 2015 | Colorado, US | 48 | Friday, July 10, 2015 | 47:33:30.00 |
| Hardrock 100 2014 | Colorado, US | 47 | Friday, July 11, 2014 | 47:31:09.00 |
| Hardrock 100 2013 | Colorado, US | 46 | Friday, July 12, 2013 | 43:19:32.00 |
| Hardrock 100 2011 | Ohio, US | 44 | Friday, July 15, 2011 | 47:40:00.00 |
| Hardrock 100 2010 | Ohio, US | 43 | Friday, July 9, 2010 | DNF |
| Hardrock 100 2009 | Ohio, US | 42 | Friday, July 10, 2009 | 46:00:29.00 |
| Hardrock 100 2006 | Ohio, US | 39 | Friday, July 14, 2006 | 47:02:50.00 |
| Hardrock 100 2005 | Ohio, US | 38 | Friday, July 8, 2005 | DNF |
| Hardrock 100 2004 | Ohio, US | 37 | Friday, July 9, 2004 | DNF |