| Dennis Drey's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Hardrock 100 2016 | New Mexico, US | 64 | Friday, July 15, 2016 | DNF |
| Hardrock 100 2013 | New Mexico, US | 61 | Friday, July 12, 2013 | 45:52:31.00 |
| Hardrock 100 2012 | New Mexico, US | 61 | Friday, July 13, 2012 | 44:24:00.00 |
| Hardrock 100 2011 | New Mexico, US | 60 | Friday, July 15, 2011 | 43:57:00.00 |
| Hardrock 100 2010 | New Mexico, US | 58 | Friday, July 9, 2010 | 45:50:50.00 |
| Hardrock 100 2009 | New Mexico, US | 57 | Friday, July 10, 2009 | 38:17:02.00 |
| Hardrock 100 2008 | New Mexico, US | 57 | Friday, July 11, 2008 | 42:03:43.00 |
| Hardrock 100 2007 | New Mexico, US | 56 | Friday, July 13, 2007 | 37:19:25.00 |
| Hardrock 100 2006 | New Mexico, US | 55 | Friday, July 14, 2006 | 38:46:44.00 |
| Hardrock 100 2005 | New Mexico, US | 54 | Friday, July 8, 2005 | 38:32:31.00 |
| Hardrock 100 2004 | New Mexico, US | 53 | Friday, July 9, 2004 | 39:26:36.00 |