| ∞ | 2025 | Elkhart Lake, WI (Road America) | |
| ∞ | 2023 | Warwick, RI | |
| ∞ | 2022 | Palm Springs, CA | |
| ∞ | 2021 | Hilton Head Island, SC | |
| ∞ | 2020 | Palm Springs, CA | |
| 50 | 2019 | Greenville, SC | |
| 49 | 2018 | Pittsburgh, PA (PIR) | Results |
| 48 | 2017 | New Orleans, LA (NOLA) | Results |
| 47 | 2016 | Monterey, CA (Mazda Raceway) | Results |
| 46 | 2015 | Galloway, NJ (NJ Motorsports Park) | |
| 45 | 2014 | Beaver Creek, CO | Results |
| 44 | 2013 | Monterey, CA (Mazda Raceway) | |
| 43 | 2012 | Columbus/Polaris, OH (Mid-Ohio) | |
| 42 | 2011 | Hoover, AL (Barber Motorsports Park) | |
| 41 | 2010 | Elkhart Lake, WI (Road America) | |
| 40 | 2009 | Lake Lanier Islands, GA (Road Atlanta) | |
| 39 | 2008 | Watkins Glen, NY (Watkins Glen) | |
| 38 | 2007 | Fort Worth, TX | |
| 37 | 2006 | Grand Rapids, MI | |
| 36 | 2005 | Greensboro, NC (VIR) | |
| 35 | 2004 | Pasadena, CA (California Speedway) | |
| 34 | 2003 | Austin, TX | |
| 33 | 2002 | Keystone, CO | |
| 32 | 2001 | Waterville Valley, NH (NHIS) | |
| 31 | 2000 | Greenville, SC (Road Atlanta) | |
| 30 | 1999 | Indianapolis, IN (Putnam Park) | |
| 29 | 1998 | Orlando, FL (Sebring Raceway) | |
| 28 | 1997 | Waterville Valley, NH | |
| 27 | 1996 | Tyson's Corner, VA (Summit Point) | |
| 26 | 1995 | Breckenridge, CO | |
| 25 | 1994 | Andover, MA | |
| 24 | 1993 | Sonoma, CA | |
| 23 | 1992 | West Palm Beach, FL | |
| 22 | 1991 | Waterbury, CT | |
| 21 | 1990 | Columbus, OH | |
| 20 | 1989 | Keystone, CO | |
| 19 | 1988 | Rochester, NY | |
| 18 | 1987 | Tulsa, OK | |
| 17 | 1986 | Haines City, FL | |
| 16 | 1985 | Monterey, CA | |
| 15 | 1984 | Sturbridge, MA | |
| 14 | 1983 | Colorado Springs, CO | |
| 13 | 1982 | Albany, NY | |
| 12 | 1981 | Milwaukee, WI | |
| 11 | 1980 | San Diego, CA | |
| 10 | 1979 | Boston, MA | |
| 9 | 1978 | Milwaukee, WI | |
| 8 | 1977 | San Francisco, CA | |
| 7 | 1976 | Washington, DC | |
| 6 | 1975 | East Troy, WI | |
| 5 | 1974 | Waterbury, CT | |
| 4 | 1973 | Atlantic City, NJ | |
| 3 | 1972 | Virginia Beach, VA | |
| 2 | 1971 | Lanham, MD | |
| 1 | 1970 | Concord, MA | |
