The 6 Hours of Spa-Francorchamps is a speed motor racing race that takes place annually at the Circuit de Spa-Francorchamps in Belgium. It emerged in 1963 as a 500 km race that was held in May as part of the World Endurance Championship and in which grand touring cars participated. In 1965 sport prototypes also began to participate, and in 1966 it adopted the 1000 km format, similar to other prestigious endurance races such as the 1000 km of Monza and the 1000 km of Nürburgring.