The Circuit de Chimay, located in the Hainaut province of Belgium, is a historic road racing circuit that has hosted motorsport events since the 1920s. Originally a triangular course using public roads around the town of Chimay, it was a staple of Belgian motorsport for decades, most notably hosting Formula 1 races in 1956 and 1958, albeit as non-championship events. The circuit's history is deeply intertwined with the Belgian Grand Prix, serving as an alternative venue when Spa-Francorchamps was deemed unsuitable or unavailable.

The original layout was a fast and challenging 10.6 km (6.6 miles) course characterized by long straights, sweeping corners, and tight village sections. Key corners included the challenging "Eau Rouge" of Chimay (unrelated to the more famous Spa corner), a blind uphill right-hander, and numerous fast kinks and bends that demanded precision and bravery from drivers. Its public road nature meant the surface was often bumpy and unpredictable, adding to the challenge.

Over the years, the circuit underwent several modifications, primarily aimed at increasing safety and reducing its length. The most significant alteration came in the 1970s, resulting in a shorter, more modern permanent circuit. While the original layout is no longer used for racing, sections of it are still visible and accessible to the public. The modern circuit, still operational, is much shorter and serves mainly for club-level racing, track days, and testing.

Chimay was known for hosting various types of motorsport, including Formula racing, sports car racing, and motorcycle racing. The circuit’s fast nature and challenging layout made it a popular venue for both national and international events. What made Chimay unique was its blend of high-speed sections and tight, technical corners, requiring a delicate balance of power and handling. Its history and the fact that it used public roads contributed to its distinct character, making it a memorable circuit for drivers and spectators alike. While it no longer hosts major international events, the name of Chimay remains synonymous with Belgian motorsport history.