| Randy Isler's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Hardrock 100 2016 | New Mexico, US | 59 | Friday, July 15, 2016 | DNF |
| Hardrock 100 2015 | New Mexico, US | 58 | Friday, July 10, 2015 | DNF |
| Hardrock 100 2014 | New Mexico, US | 57 | Friday, July 11, 2014 | 41:35:03.00 |
| Hardrock 100 2013 | New Mexico, US | 56 | Friday, July 12, 2013 | 41:23:34.00 |
| Hardrock 100 2012 | New Mexico, US | 55 | Friday, July 13, 2012 | 43:01:00.00 |
| Hardrock 100 2011 | New Mexico, US | 54 | Friday, July 15, 2011 | 38:57:00.00 |
| Hardrock 100 2010 | New Mexico, US | 53 | Friday, July 9, 2010 | 40:44:35.00 |
| Hardrock 100 2009 | New Mexico, US | 52 | Friday, July 10, 2009 | 39:55:07.00 |
| Hardrock 100 2008 | New Mexico, US | 51 | Friday, July 11, 2008 | 44:30:44.00 |
| Hardrock 100 2007 | New Mexico, US | 50 | Friday, July 13, 2007 | 37:27:26.00 |
| Hardrock 100 2006 | New Mexico, US | 49 | Friday, July 14, 2006 | 37:37:07.00 |
| Hardrock 100 2005 | New Mexico, US | 48 | Friday, July 8, 2005 | 41:23:56.00 |
| Hardrock 100 2004 | New Mexico, US | 47 | Friday, July 9, 2004 | 38:56:43.00 |
| Hardrock 100 2003 | New Mexico, US | 46 | Friday, July 11, 2003 | 39:28:31.00 |
| Hardrock 100 2001 | New Mexico, US | 44 | Friday, July 13, 2001 | 35:51:21.00 |
| Hardrock 100 2000 | 43 | Friday, July 7, 2000 | 34:01:24.00 | |
| Hardrock 100 1999 | New Mexico, US | 42 | Friday, July 9, 1999 | 31:05:04.00 |
| Hardrock 100 1998 | New Mexico, US | 41 | Friday, July 10, 1998 | 31:14:50.00 |
| Hardrock 100 1997 | New Mexico, US | 40 | Friday, July 11, 1997 | 32:17:05.00 |
| Hardrock 100 1996 | New Mexico, US | 39 | Friday, July 12, 1996 | 32:36:36.00 |