The finest sportscar drivers compete in this weekend of endurance and speed with five premier sportscar racing series at Watkins Glen International, featuring IMSA TUDOR United SportsCar Championship and the Sahlen’s Six Hours of The Glen – one segment of the Tequila Patron North American Endurance Championship.  On Saturday, witness Continental Tire SportsCar Challenge’s Continental Tire 150. In total, the five series amount to nearly 24 hours of on-track action includes: Cooper Tires Prototype Lites, Lamborghini Super Trofeo and Porsche GT3 Cup USA.