The Circuit de Catalunya [seer-kweet-da-Cataloonya] is a racetrack in Montmel�, to the north of Barcelona, Spain. It is home to the Formula One Spanish Grand Prix and the motorcycle Catalonia Grand Prix. With long straights and a variety of corners, the Circuit de Catalunya is seen as an all-rounder circuit. As such it is probably one of the sport's most important testing grounds. Circuit length 4.655km (2.875 miles)..