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The Six Hours of Watkins Glen (currently sponsored as the Sahlen's Six Hours of The Glen) is a sports car endurance race held annually at Watkins Glen International in Watkins Glen, New York. The race dates from 1948, and has been a part of theSCCA National Sports Car Championship, United States Road Racing Championship, World Sportscar Championship, IMSA GT Championship, Rolex Sports Car Series and currently the United SportsCar Championship.