June 4, 1972       Spring Nationals      Century 21 Raceways, Aurora, CO      AHRA Pro Stock      Irv Beringhaus
June 4, 1972       Spring Nationals      Century 21 Raceways, Aurora, CO      AHRA Funny Car      Tom McEwen
June 4, 1972       Spring Nationals      Century 21 Raceways, Aurora, CO      AHRA Top Fuel      Jim Nicoll
May 26, 1973       Mile High 150      Century 21 Raceways, Aurora, CO      NASCAR Winston West Series      Bob Kauf
June 3, 1973       Spring Nationals      Century 21 Raceways, Aurora, CO      AHRA Top Fuel      Don Garlits
June 3, 1973       Spring Nationals      Century 21 Raceways, Aurora, CO      AHRA Pro Stock      Dick Landy
June 3, 1973       Spring Nationals      Century 21 Raceways, Aurora, CO      AHRA Funny Car      Dale Pulde