| September 1, 1949 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Eddie Anderson | |
| July 4, 1950 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Don White | |
| September 1, 1950 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Tommy Melvin | |
| July 1, 1951 | Gold Cup | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Ernie Derr |
| August 25, 1951 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Chris Skadal | |
| September 3, 1951 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Dick Rathmann | |
| June 29, 1952 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Tubby Harrison | |
| July 13, 1952 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Jim Ward | |
| August 23, 1952 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Ernie Derr | |
| September 1, 1952 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Don White | |
| May 31, 1953 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bob Slater | |
| June 28, 1953 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Ernie Derr | |
| August 29, 1953 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Don White | |
| August 30, 1953 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bobby Grim | |
| September 4, 1953 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Dick Ferguson | |
| September 6, 1953 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Ernie Derr | |
| September 7, 1953 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bobby Grim | |
| July 18, 1954 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Jim Ward | |
| August 28, 1954 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Ernie Derr | |
| September 5, 1954 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Don White | |
| July 10, 1955 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Herschel Buchanan | |
| September 4, 1955 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Don White | |
| June 10, 1956 | Hawkeye Futurity | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Jud Larson |
| July 15, 1956 | Iowa International | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Johnny Beauchamp |
| August 24, 1956 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Jud Larson | |
| August 26, 1956 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bobby Grim | |
| August 29, 1956 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Ed Loetscher | |
| August 30, 1956 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Jud Larson | |
| August 31, 1956 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bobby Grim | |
| September 2, 1956 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Johnny Beauchamp | |
| June 9, 1957 | Hawkeye Futurity | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bobby Grim |
| July 14, 1957 | International 300 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Bob Burdick |
| August 23, 1957 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bob Cleberg | |
| August 25, 1957 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bob Cleberg | |
| August 29, 1957 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bobby Grim | |
| August 30, 1957 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bobby Grim | |
| September 1, 1957 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Bob Burdick | |
| June 8, 1958 | Hawkeye Futurity | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bobby Grim |
| July 13, 1958 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Don White | |
| August 24, 1958 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Red Amick | |
| August 28, 1958 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bobby Grim | |
| August 29, 1958 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Johnny Pouelson | |
| August 30, 1958 | Centennial Sweepstakes | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Bobby Grim |
| June 7, 1959 | Hawkeye Futurity | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Pete Folse |
| August 28, 1959 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Harold Leep | |
| August 30, 1959 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Harold Leep | |
| September 2, 1959 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Pete Folse | |
| September 5, 1959 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Pete Folse | |
| June 19, 1960 | Hawkeye Futurity | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Pete Folse |
| August 28, 1960 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Pete Folse | |
| September 1, 1960 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Pete Folse | |
| September 3, 1960 | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Buzz Barton | |
| June 11, 1961 | Hawkeye Futurity | Iowa State Fairgrounds, Des Moines, IA | IMCA Sprint Car | Buzz Barton |
| July 13, 1969 | Iowa 300 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Ernie Derr |
| July 11, 1971 | Iowa 300 | Iowa State Fairgrounds, Des Moines, IA | IMCA Stock Car | Ernie Derr |
| September 14, 1974 | Bulldog 150 | Iowa State Fairgrounds, Des Moines, IA | USAC Stock Car | Butch Hartman |
| July 3, 1975 | Bulldog 150 | Iowa State Fairgrounds, Des Moines, IA | USAC Stock Car | Ernie Derr |
| September 26, 1981 | Iowa State Fairgrounds, Des Moines, IA | USAC Stock Car | Joe Wallace | |
| July 22, 2015 | Iowa State Fairgrounds, Des Moines, IA | NSL 410 Sprint Car | Craig Dollansky | |
| May 29, 2016 | Iowa State Fairgrounds, Des Moines, IA | NSL 410 Sprint Car | Craig Dollansky |