| 1985 | Cheyenne, WY |
| 1986 | Portland, OR |
| 1987 | North Platte, NE |
| 1988 | Salt Lake City, UT |
| 1989 | Omaha, NE |
| 1990 | Pocatello, ID |
| 1991 | Kansas City, MO |
| 1992 | Cheyenne, WY |
| 1993 | Stockton, CA |
| 1994 | Ontario, CA |
| 1995 | Omaha, NE |
| 1996 | Pendleton, OR |
| 1997 | North Platte, NE |
| 1998 | Salt Lake City, UT |
| 1999 | Kansas City, MO |