July 3, 1988	Grand Prix of Colorado	Mountain View Motor Sports Park, Mead, CO	American IndyCar Series	Robby Unser
June 20, 1993	Grand Prix of Colorado	Mountain View Motor Sports Park, Mead, CO	American IndyCar Series	Rod Bennett
July 17, 1994		Mountain View Motor Sports Park, Mead, CO	American IndyCar Series	Ken Petrie