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
August 8, 2016	Front Row Challenge	Southern Iowa Speedway, Oskaloosa, IA	NSL 410 Sprint Car	Daryn Pittman