This is a 50,000 capacity amphitheatre in East Troy, Wisconsin. The seasonal venue was built in 1977, and it features a characteristic wooden roof covering the 9,500-seat pavilion, and a sprawling lawn. The theatre is located roughly equidistant between Madison, Milwaukee, and Chicago, so draws a wide regional audience. Alpine Valley is generally considered the Milwaukee stop on major tours, and the Chicago stop when the act doesn't perform in Illinois. Until 1993, when the San Manuel Amphitheater was built in California, it was the largest amphitheater in the United States.