Jul 25, 2015 4 Summit Challenge. The Four Summit Challenge course covers the two mountain passes along Warm Lake Road in Cascade. This challenging course attracts cyclists from a wide variety of places and can include up to 750 riders. The ride starts at the American Legion Hall in downtown Cascade. For more information check out www.4summitchallenge.com. Watch or participate in the races and then enjoy the grounds and water at Kelly’s Whitewater Park.