Continue past the Kohleralm mountain hut and you will soon come to the Lafatscher Niederleger hut. From there, the route gets a little steeper and follows the road down into the Hinterau Valley. If you would like to visit the Kastenalm mountain hut, you can take a short detour at the marked fork in the road. From there, continue along the road out of the valley, past the source of the Isar river. This is followed by a gentle ascent up to Gleirschhöhe (1069 m) and a leisurely hike back down past the Gasthof Wiesenhof guesthouse until you finally reach the Isarbrücke bridge and then Scharnitz. If the route is too long for you to cover on foot, you can pay to hire a bike from the Hallerangerhaus mountain hut and save yourself some time on the route down (between the Kastenalm mountain hut and Scharnitz).