The Solitude racetrack is an 11.4 km (7.1 mi) race circuit on public roads used for motorsport in the Leonberg area, west of Stuttgart, Germany.

It is named after Castle Solitude and until 1965 has hosted various motorcycle and automobile races.

The traditional track used for motorcycle racing is located above the Bergheim district of Stuttgart, but not in the center of the most important 11.3 km long variant of the former race track.

From there it continues in the direction of Katzenbacher Hof with the Steinbachsee, past the Büsnau district of Stuttgart to the Schattengrund and through the Mahdental back to start and finish before Glemseck.

Participants or winners here were Hans Herrmann, Innes Ireland, Jim Clark, Dan Gurney, John Surtees, Jack Brabham.