What is the name of the famous racetrack used for Le Mans?

The famous racetrack used for the 24 Hours of Le Mans is the Circuit de la Sarthe.

The circuit is a temporary-style road course near Le Mans, France. Much of its lap uses public roads that are closed for racing, linking the permanent Bugatti section with roads toward Mulsanne and Arnage. That unusual combination makes it one of the world's longest and most distinctive major racing circuits.

The modern circuit's history reaches back to the first French Grand Prix in 1906, while the 24 Hours of Le Mans began in 1923. Its layout has changed repeatedly for safety, including the addition of chicanes to the formerly uninterrupted Mulsanne Straight in 1990.

A common mix-up is calling the whole venue the Mulsanne Straight. Mulsanne is only one famous section of the Circuit de la Sarthe; the track also includes landmarks such as Tertre Rouge, Indianapolis, Arnage and the Porsche Curves.