International Race of Champions (IROC) is a North American auto racing competition, created by Les Richter, Roger Penske and Mike Phelps, promoted as an American-motorsports equivalent of an all-star game. Despite its name, IROC is primarily associated with North American oval track racing.

Auto racing is a motorsport involving the racing of automobiles for competition. In North America, the term is commonly used to describe all forms of automobile sport including non-racing disciplines.