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 the SCCA National Sports Car Championship United States Road Racing Championship World Sportscar Championship IMSA GT Championship Rolex Sports Car Series and currently the IMSA WeatherTech SportsCar Championship.