The Nürburgring Nordschleife is a motor racing circuit in Germany. Its over 20.8 km (12.9 mi) long old section dating from 1927, was truncated in 1982 as international championships had started to boycott the track after 1976. The adjacent modern Nürburgring Grand Prix track was opened in 1984. The two tracks can host events independently, or they can be combined, e. g. for the 24 Hours Nürburgring. As a result, lap times have been set in racing events on numerous Nordschleife track variants ranging from less than the shortest 20.832 km (12.9 mi) to the current maximum of nearly 26 km (16.2 mi).
An even longer approx. 28 km (17.4 mi) combined track that included the 7.7 km (4.8 mi) Südschleife was seldom used for major races since the 1930s. This shorter southern circuit was not modernized in the 1970s and was sacrificed for the 1980s construction of the modern track, as were the old pit facilities, the Südkehre (southern turn) and the straight behind the pits which were used in an original Nordschleife lap.