Watkins Glen International, nicknamed "The Glen", is an automobile race track located in Watkins Glen, New York, at the southern tip of Seneca Lake. The sports car racing facility is owned by the International Speedway Corporation. It was long known around the world as the home of the United States Grand Prix, which it hosted for 20 consecutive years (1961–1980) but since 1948, it has been home to road racing of nearly every class, such as Formula One, the World Sportscar Championship, Trans-Am, Can-Am, the NASCAR Sprint Cup Series, the International Motor Sports Association and the Verizon IndyCar Series. Initially, public roads in the village were used for the race course. In 1956, a permanent circuit for the race was built. In 1968, the race was extended to six hours, earning the nickname "6 Hours of Watkins Glen". The circuit's current layout has more/less been the same since 1971, although a chicane was installed at the uphill esses in 1975 to slow cars through these corners, where there was a fatality during practice at the 1973 United States Grand Prix. The chicane was removed in 1985, but another chicane called the "Inner Loop" was installed in 1992 after a fatal accident during the previous year's NASCAR Winston Cup event. The circuit is known as the Mecca of North American road racing and is a very popular venue among fans and drivers.