The Czech Republic motorcycle Grand Prix was a motorcycling event that was part of the Grand Prix motorcycle racing season. Before 1993, the race was known as the Czechoslovak motorcycle Grand Prix. Since 1965, the race was a part of world Grand Prix series.

The Masaryk circuit or Masarykring, also referred to as the Brno Circuit, refers to two motorsport race tracks located in Brno, Czech Republic. The original street circuit was made up of public roads, and at its longest measured 29.194 km (18.140 mi). In 1949, events such as the Czechoslovakian Grand Prix attracted top teams and drivers. The track is named after the first president of Czechoslovakia, Tomáš Garrigue Masaryk. Racing on the old roads ended after 1986, when the new (current) circuit was opened. Since August 2023, the circuit is owned by Shakai.