Hockenheim ( pronunciation ) is a German town in northwest Baden-Württemberg, about 20 km south of Mannheim and 10 km west of Walldorf. It is located in the Upper Rhine valley on the touristical theme routes Baden Asparagus Route ("Badische Spargelstraße") and Bertha Benz Memorial Route. The town is widely known for its Hockenheimring, a motor racing course, which hosted over 30 Formula One German Grand Prix races since 1970.