Want the biggest Rapids out of Banff? The Horseshoe canyon on the Bow River contains some of the biggest rapids in Alberta. Inside Out Experience run full and half day tours rafting class 3/4 whitewater. Tours also include activities such as surfing and cliff jumping. This video focuses on the largest waves of the trip as rafts paddle through the canyon. The Horseshoe canyon is located in Southern Alberta, between Calgary and Banff/Canmore.