You can plan a day group from Sankt Leonhard to the waterfall and back with a few drinking breaks for all the more amazement. It can be 5 hours. You should be able to climb high and it is best to go in the first half of the day to enjoy the shady forest. Although the route is (rightly) heavily frequented, you should definitely take this variety of watercourse, mountains and forest with you. Attention, such a strong flowing river is noisy. The toilet, which was indicated halfway, was unfortunately locked. Fortunately, none of the paths tried by handkerchiefs.