| Name | Date and Time | Entrants |
|---|---|---|
| 2008 Rattlesnake Ramble | Sun | September 21, 2008 | 08:00AM(MDT) | 62 entrants |
| Hardrock 100 2008 | Fri | July 11, 2008 | 06:00AM(MDT) | 141 entrants |
| 2007 Rattlesnake Ramble | Sat | September 15, 2007 | 08:00AM(MDT) | 63 entrants |
| Hardrock 100 2007 | Fri | July 13, 2007 | 06:00AM(MDT) | 134 entrants |
| 2006 Rattlesnake Ramble | Sat | September 16, 2006 | 08:00AM(MDT) | 58 entrants |
| Hardrock 100 2006 | Fri | July 14, 2006 | 06:00AM(MDT) | 131 entrants |
| 2005 Rattlesnake Ramble | Sat | September 17, 2005 | 08:00AM(MDT) | 35 entrants |
| Hardrock 100 2005 | Fri | July 08, 2005 | 06:00AM(MDT) | 124 entrants |
| Hardrock 100 2004 | Fri | July 09, 2004 | 06:00AM(MDT) | 124 entrants |
| Hardrock 100 2003 | Fri | July 11, 2003 | 06:00AM(MDT) | 112 entrants |
| Hardrock 100 2001 | Fri | July 13, 2001 | 06:00AM(MDT) | 118 entrants |
| Hardrock 100 2000 | Fri | July 07, 2000 | 06:00AM(MDT) | 114 entrants |
| Hardrock 100 1999 | Fri | July 09, 1999 | 06:00AM(MDT) | 109 entrants |
| Hardrock 100 1998 | Fri | July 10, 1998 | 06:00AM(MDT) | 82 entrants |
| Hardrock 100 1997 | Fri | July 11, 1997 | 06:00AM(MDT) | 99 entrants |
| Hardrock 100 1996 | Fri | July 12, 1996 | 06:00AM(MDT) | 91 entrants |
| Hardrock 100 1994 | Fri | July 08, 1994 | 06:00AM(MDT) | 74 entrants |
| Hardrock 100 1993 | Fri | July 09, 1993 | 06:00AM(MDT) | 35 entrants |
| Hardrock 100 1992 | Fri | July 10, 1992 | 06:00AM(MDT) | 42 entrants |