This is Elbow Falls in the Elbow Valley area of Kananaskis (i.e. the area before you get to the "real", high mountains. We were there a week ago and were just in time to enjoy some fall colour. The Falls are quite spectacular. Last June, during dreadful flooding and damage throughout Alberta, the water level reached the top rock area of the waterfall. Calgary's parks and natural areas were devastated, though some of the paths are now being replaced or repaired.