Solitude

The Solitudering was a narrow temporary road course set in wooded countryside near Stuttgart that briefly held an important non-championship Formula 1 race. Used mainly for motorcycles, a Grand Prix for cars was run sporadically. The Mercedes-Benz GP team occasionally used the circuit for testing during the 1930s, especially before races at the Nürburgring which Solitude resembled. It closed on financial grounds in 1965 after which the Solitude Grand Prix was revived on two occasions at Hockenheim.