August 4, 1981		Colorado National Speedway, Dacono, CO	USAC Midget	Dave Strickland Jr.
August 5, 1981		Colorado National Speedway, Dacono, CO	USAC Midget	Rich Vogler
August 13, 1982		Colorado National Speedway, Dacono, CO	NASCAR Grand American	Larry Phillips
September 18, 1982		Colorado National Speedway, Dacono, CO	NASCAR Grand American	Larry Phillips
July 4, 1989		Colorado National Speedway, Dacono, CO	American IndyCar Series	Buddy Lazier
July 4, 1989		Colorado National Speedway, Dacono, CO	American IndyCar Series	Robby Unser
September 2, 1989		Colorado National Speedway, Dacono, CO	American IndyCar Series	Robby Unser
September 3, 1989		Colorado National Speedway, Dacono, CO	American IndyCar Series	Robby Unser
July 15, 1990	Rocky Mountain 150	Colorado National Speedway, Dacono, CO	American IndyCar Series	Johnny Unser
July 16, 1991	Mile High Challenge 150	Colorado National Speedway, Dacono, CO	ARTGO Stock Car	Rick Carelli
July 28, 1991	Koa/Purifoy 150	Colorado National Speedway, Dacono, CO	American IndyCar Series	Bill Tempero
August 21, 1993	Colorado Chevrolet/Geo 100	Colorado National Speedway, Dacono, CO	NASCAR Southwest Series	Doug George
April 24, 1994	Total Motor Oil 300	Colorado National Speedway, Dacono, CO	ASA Stock Car	Butch Miller
May 20, 1995	Mistic Premium Beverages 200	Colorado National Speedway, Dacono, CO	NASCAR Winston West Series	Mike Chase
July 15, 1995	Total Petroleum 200	Colorado National Speedway, Dacono, CO	NASCAR SuperTruck Series	Butch Miller
June 1, 1996	Colorado 200	Colorado National Speedway, Dacono, CO	NASCAR Craftsman Truck Series	Mike Skinner
July 13, 1996	Snap-On 200	Colorado National Speedway, Dacono, CO	NASCAR Winston West Series	Ron Hornaday Jr.
July 19, 1997	Colorado 250	Colorado National Speedway, Dacono, CO	NASCAR Craftsman Truck Series	Ron Hornaday Jr.
May 8, 1999	Colorado 150	Colorado National Speedway, Dacono, CO	NASCAR Midwest Series	Jason Schuler
June 3, 2000	Sachs Lawlor 150	Colorado National Speedway, Dacono, CO	NASCAR Midwest Series	Steve Carlson
June 2, 2001	Sachs Lawlor 150	Colorado National Speedway, Dacono, CO	NASCAR Midwest Series	Steve Carlson
July 14, 2001	NAPA 250	Colorado National Speedway, Dacono, CO	NASCAR Winston West Series	Steve Portenga
August 18, 2001	United Power Touchstone Energy 150	Colorado National Speedway, Dacono, CO	NASCAR Southwest Series	Auggie Vidovich
June 1, 2002	Auto Trader 150	Colorado National Speedway, Dacono, CO	NASCAR Midwest Series	Steve Carlson
August 17, 2002	United Power Touchstone Energy 150	Colorado National Speedway, Dacono, CO	NASCAR Southwest Series	Jerry Robertson
June 7, 2003	Auto Trader 150	Colorado National Speedway, Dacono, CO	NASCAR Midwest Series	Eddie Hoffman
August 16, 2003	United Power/Touchstone Energy 150	Colorado National Speedway, Dacono, CO	NASCAR Southwest Series	David Gilliland
June 5, 2004	Auto Trader 150	Colorado National Speedway, Dacono, CO	NASCAR Midwest Series	Justin Diercks
August 21, 2004	United Power/Touchstone Energy 150	Colorado National Speedway, Dacono, CO	NASCAR Southwest Series	Jim Pettit II
October 9, 2004	NAPA 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Mike Duncan
June 5, 2005	Auto Trader 150	Colorado National Speedway, Dacono, CO	NASCAR Southwest/Midwest Series	Brandon Riehl
July 30, 2005	United Power Touchstone Energy 150	Colorado National Speedway, Dacono, CO	NASCAR Southwest Series	Jerry Robertson
June 3, 2006	Auto Trader 150	Colorado National Speedway, Dacono, CO	NASCAR Southwest/Midwest Series	Josh Vadnais
August 19, 2006	United Power/Touchstone Energy 150	Colorado National Speedway, Dacono, CO	NASCAR Southwest/Midwest Series	Eric Holmes
June 2, 2007	NAPA 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Mike Duncan
June 7, 2008	Toyota NAPA 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Eric Holmes
August 15, 2009	Toyota NAPA 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Paulie Harraka
August 14, 2010	Toyota NAPA Auto Parts Bonus Challenge 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Eric Holmes
August 6, 2011	Toyota NAPA Auto Parts 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Dylan Kwasniewski
July 28, 2012	NAPA Toyota 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Greg Pursley
July 27, 2013	Toyota NAPA Auto Parts 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Derek Thorn
July 26, 2014	NAPA Auto Parts Toyota 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Chris Eggleston
August 22, 2015	NAPA Auto Parts Toyota 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Ryan Partridge
June 11, 2016	NAPA Toyota 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Chris Eggleston
June 10, 2017	NAPA Toyota 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Chris Eggleston
June 9, 2018	NAPA Auto Parts 175	Colorado National Speedway, Dacono, CO	NASCAR West Series	Derek Thorn
June 8, 2019	NAPA Auto Parts 150	Colorado National Speedway, Dacono, CO	NASCAR West Series	Hailie Deegan
August 22, 2020	ENEOS 150	Colorado National Speedway, Dacono, CO	ARCA West Series	Jesse Love
July 31, 2021	NAPA Auto Parts Colorado 150	Colorado National Speedway, Dacono, CO	ARCA West Series	Joey Iest