Many different racing series have had the occasion to race at Road America. The first was the Sports Car Club of America (SCCA) on September 10, 1955. The Road America 500 is a sports car race that was part of different championships, among them the SCCA National Sports Car Championship, the United States Road Racing Championship and the IMSA GT Championship. Currently it is a points-paying race of the United SportsCar Championship. The Grand Prix of Road America was an open-wheel race held as part of the Champ Car World Series