May 28, 1950             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Herschel Buchanan
August 9, 1950             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Herschel Buchanan
August 8, 1951             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Russ Runnels
August 4, 1952             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Dominick Perlick
August 8, 1953             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Les Snow
August 7, 1954             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Don White
August 8, 1955             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Ernie Derr
June 16, 1956             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Johnny Beauchamp
June 16, 1956             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Johnny Beauchamp
July 4, 1956             Southern Iowa Speedway, Oskaloosa, IA      IMCA Sprint Car      Don Carr
August 8, 1956             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Johnny Beauchamp
August 11, 1956             Southern Iowa Speedway, Oskaloosa, IA      IMCA Sprint Car      Jack Jordan
June 15, 1957             Southern Iowa Speedway, Oskaloosa, IA      IMCA Stock Car      Bob Burdick
August 9, 1957             Southern Iowa Speedway, Oskaloosa, IA      IMCA Sprint Car      Bobby Grim
August 9, 1958             Southern Iowa Speedway, Oskaloosa, IA      IMCA Sprint Car      Bobby Grim
July 29, 1959             Southern Iowa Speedway, Oskaloosa, IA      IMCA Sprint Car      Jerry Blundy
August 10, 1960             Southern Iowa Speedway, Oskaloosa, IA      IMCA Sprint Car      A.J. Shepherd
August 9, 2005       Ultimate Challenge      Southern Iowa Speedway, Oskaloosa, IA      ASCS Sprint Bandits      Levi Jones
August 10, 2009       Front Row Challenge      Southern Iowa Speedway, Oskaloosa, IA      All Star Circuit of Champions Sprint Car      Sammy Swindell
August 9, 2010       Front Row Challenge      Southern Iowa Speedway, Oskaloosa, IA      All Star Circuit of Champions Sprint Car      Sammy Swindell
August 10, 2010       Ultimate Challenge      Southern Iowa Speedway, Oskaloosa, IA      USAC Sprint Car      Bud Kaeding
August 8, 2011       Front Row Challenge      Southern Iowa Speedway, Oskaloosa, IA      All Star Circuit of Champions Sprint Car      Sammy Swindell
August 9, 2011       Ultimate Challenge      Southern Iowa Speedway, Oskaloosa, IA      USAC Sprint Car      Kyle Larson
August 6, 2012             Southern Iowa Speedway, Oskaloosa, IA      USAC Sprint Car      Kyle Larson
August 6, 2012       Front Row Challenge      Southern Iowa Speedway, Oskaloosa, IA      All Star Circuit of Champions Sprint Car      Daryn Pittman
August 7, 2012       Ultimate Challenge      Southern Iowa Speedway, Oskaloosa, IA      USAC Sprint Car      Kyle Larson
August 5, 2013       Front Row Challenge      Southern Iowa Speedway, Oskaloosa, IA      ASCS 360 Sprint Car      Brian Brown
August 6, 2013       Ultimate Challenge      Southern Iowa Speedway, Oskaloosa, IA      USAC Sprint Car      Jon Stanbrough
August 4, 2014       Front Row Challenge      Southern Iowa Speedway, Oskaloosa, IA      ASCS 360 Sprint Car      Brian Brown
August 10, 2015       Front Row Challenge      Southern Iowa Speedway, Oskaloosa, IA      NSL 410 Sprint Car      Brad Sweet