The Grand Prix des Frontières was a motor race held at a street circuit in Chimay, Belgium. The race was created by Jules Buisseret, who was also responsible for the circuit's existence. The first event was held in 1926 and was discontinued after the 1972 event for safety reasons.
Since the 1980s, races for classic motorcycles have been run on a reduced version of the Chimay road circuit under the banner of the Grand Prix des Frontières. The full circuit was used for the 2008 anniversary races, but since that year the full circuit has been reserved for special occasions, with the regular annual events using the shorter course.