The Circuit Zolder, also known as Circuit Terlamen, is an undulating 4.011 km motorsport race track in Heusden-Zolder (BEL).
Built in 1963, Zolder hosted the Formula One Belgian Grand Prix on 10 separate occasions in the 1970s and 1980s, as well as the 1980 Belgian motorcycle Grand Prix. F1 moved to Zolder in 1973 and with the exception of a race at Nivelles-Baulers in 1974, Zolder was the location of the Belgian Grand Prix until 1982.
In the beginning of 2006, the track underwent safety adaptations. In 2007, the track hosted a Champ Car World Series Grand Prix, and a round of the FIA GT Championship. The track was venue of a round of the World Series by Renault championship from 2003 to 2006, and replaced Zandvoort as site for the Masters of Formula 3 in 2007 and 2008. Zolder was featured on the car programme Top Gear in 2008. In the episode, the show's British hosts competed against their German counterparts from D MOTOR. Zolder hosted also the FIA WTCC Race of Belgium in 2010 and 2011. The last race they drove in 2011 was won by Rob Huff in a Chevrolet and Gabriele Tarquini in a SEAT. The WTCC then disappeared from the Belgian circuits until in 2014 the circus returned to Spa.