| May 30, 1946 | Gus Schrader Memorial | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Emory Collins |
| August 20, 1949 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Glenn Dunnaway | |
| September 5, 1949 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Eddie Anderson | |
| October 9, 1949 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Eddie Anderson | |
| August 17, 1950 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Don White | |
| August 17, 1950 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Ralph Dyer | |
| August 12, 1952 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Wally Dahl | |
| September 14, 1952 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Dominick Perlick | |
| May 30, 1953 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Ernie Derr | |
| May 31, 1953 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Deb Snyder | |
| July 4, 1953 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Deb Snyder | |
| July 5, 1953 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Ernie Derr | |
| August 16, 1953 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Ernie Derr | |
| August 23, 1953 | Hawkeye Downs Speedway, Cedar Rapids, IA | AAA Sprint Car (Midwest) | Bob Sweikert | |
| May 16, 1954 | Corn Belt Cup | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Les Snow |
| July 5, 1954 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Ernie Derr | |
| August 15, 1954 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Bill Harrison | |
| August 22, 1954 | Hawkeye Downs Speedway, Cedar Rapids, IA | AAA Sprint Car (Midwest) | Don Freeland | |
| May 15, 1955 | Corn Belt Championship | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Don White |
| July 3, 1955 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Doc Narber | |
| July 4, 1955 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Bert Hellmueller | |
| August 14, 1955 | All-Iowa 100 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Ernie Derr |
| August 21, 1955 | Hawkeye Downs Speedway, Cedar Rapids, IA | AAA Sprint Car (Midwest) | Eddie Sachs | |
| May 20, 1956 | Cornbelt Trophy | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Bud Burdick |
| July 4, 1956 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Johnny Pouelson | |
| August 13, 1956 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Doc Narber | |
| August 19, 1956 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Johnny Beauchamp | |
| May 19, 1957 | Hawkeye 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Bob Burdick |
| May 19, 1957 | Hawkeye 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Bob Burdick |
| July 4, 1957 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Bobby Grim | |
| August 11, 1957 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Buzz Barton | |
| August 13, 1957 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Johnny Beauchamp | |
| August 18, 1957 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Johnny Beauchamp | |
| August 18, 1957 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Johnny Beauchamp | |
| September 29, 1957 | Hawkeye 500 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Johnny Beauchamp |
| May 18, 1958 | Hawkeye 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Ernie Derr |
| July 4, 1958 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Bobby Grim | |
| August 11, 1958 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Bobby Grim | |
| July 5, 1959 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Ernie Derr | |
| July 5, 1959 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Pete Folse | |
| August 21, 1959 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Parnelli Jones | |
| August 21, 1959 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Parnelli Jones | |
| July 3, 1960 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | A.J. Shepherd | |
| August 20, 1960 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Leroy Neumeyer | |
| July 4, 1961 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Sprint Car | Jim McElreath | |
| April 28, 1968 | Hawkeye 200 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Stock Car | Ramo Stott |
| September 29, 1973 | Falstaff 100 | Hawkeye Downs Speedway, Cedar Rapids, IA | USAC Stock Car | Butch Hartman |
| May 21, 1989 | Hawkeye Downs Speedway, Cedar Rapids, IA | American IndyCar Series | Robby Unser | |
| May 21, 1989 | Hawkeye Downs Speedway, Cedar Rapids, IA | American IndyCar Series | Robby Unser | |
| June 6, 1989 | Miller Hawkeye 100 | Hawkeye Downs Speedway, Cedar Rapids, IA | ARTGO Stock Car | Steve Holzhausen |
| June 6, 1990 | Miller 100 | Hawkeye Downs Speedway, Cedar Rapids, IA | ARTGO Stock Car | Larry Phillips |
| June 8, 1991 | 19th Miller Draft 100 | Hawkeye Downs Speedway, Cedar Rapids, IA | ARTGO Stock Car | Joe Shear |
| July 9, 1991 | Hawkeye Downs Speedway, Cedar Rapids, IA | IMCA Modified | Dale Earnhardt | |
| July 23, 1992 | Pabst Light 100 | Hawkeye Downs Speedway, Cedar Rapids, IA | ARTGO Stock Car | Joe Shear |
| July 7, 1993 | Pabst Light 100 | Hawkeye Downs Speedway, Cedar Rapids, IA | ARTGO Stock Car | Larry Schuler |
| July 4, 1994 | Hawkeye 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Steve Holzhausen |
| June 6, 1995 | 23rd Miller Genuine Draft 100 | Hawkeye Downs Speedway, Cedar Rapids, IA | ARTGO Stock Car | Joe Shear |
| July 1, 1995 | Hawkeye Downs 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Bob Senneker |
| June 4, 1996 | 24th Miller 100 | Hawkeye Downs Speedway, Cedar Rapids, IA | ARTGO Stock Car | Steve Carlson |
| July 6, 1996 | Hawkeye Downs 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Bob Senneker |
| September 21, 1996 | Iowa 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Tony Raines |
| June 14, 1997 | Miller Hawkeye 100 | Hawkeye Downs Speedway, Cedar Rapids, IA | ARTGO Stock Car | Steve Carlson |
| July 11, 1997 | Hawkeye Downs 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Kevin Cywinski |
| September 19, 1997 | Pontiac Excitement 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Scott Hansen |
| June 16, 1998 | Miller 125 | Hawkeye Downs Speedway, Cedar Rapids, IA | NASCAR Midwest Series | Ron Breese Jr. |
| July 11, 1998 | Hawkeye Downs 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Rick Beebe |
| September 19, 1998 | AC Delco 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Mike Eddy |
| July 10, 1999 | Pontiac Excitement 250 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Tim Sauter |
| July 31, 1999 | Coors Light 125 | Hawkeye Downs Speedway, Cedar Rapids, IA | NASCAR Midwest Series | Steve Carlson |
| September 18, 1999 | AC Delco Rapidfire 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Mike Garvey |
| June 17, 2000 | WorldBestBuy.com 250 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Mike Garvey |
| August 12, 2000 | Iowa 250 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Mike Garvey |
| April 28, 2001 | Iowa 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Johnny Sauter |
| August 4, 2001 | Texas Roadhouse 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Johnny Sauter |
| May 19, 2002 | O'Reilly Auto Parts 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Joey Clanton |
| September 8, 2002 | Iowa 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Gary St. Amant |
| May 24, 2003 | Iowa 300 | Hawkeye Downs Speedway, Cedar Rapids, IA | ASA Stock Car | Mike Garvey |
| June 8, 2005 | Keith Fleck Miller 200 | Hawkeye Downs Speedway, Cedar Rapids, IA | MASS American StockCar League | Stephen Leicht |