The Schleizer Dreieck is a temporary motorsport racetrack in Thuringia near the town of Schleiz.
It is the oldest street circuit in Germany, is still known for street racing and is used both for historic motorsport and for international competition formats such as the IDM.
On June 10, 1923, the first race took place on the track that follows the course of the existing road.
Sporting highlights were the all-German championship run in 1950 with 250,000 spectators and the international Formula 3 races in the 1960s.
Over the years, the route has been modified several times.
For example, the hairpin bend in Schleiz was replaced by a shortcut in front of the town in order to smooth out the route with a chicane.
However, the two southern corners of the course continued to pass through residential areas.
On August 21, 2004, the Schleizer Dreieck, which was shortened to half its original length, was reopened after the 1.3-kilometer-long "Querspange" west of the Oberböhmsdorf district of Schleiz was completed.
Today the Schleizer Dreieck is mainly used for motorcycle, sidecar and veteran races as well as for the ADAC mountain race.
The highlight of the season is the run of the International German Motorcycle Championship (IDM).
The International German Supermoto Championship was a guest at the Schleizer Dreieck in 2020, with the route leading around the start/finish of the road race track.
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