From the Nature Park Info Center Scharnitz, follow the Hinterautalstraße about 2 km into the valley, then take a turn to the left and hike in a few serpentines to the so-called Lablehner (open meadow, with a beautiful view of the Brunnstein and into the Karwendel Valley). The path becomes flatter for a short distance (always keep to the right) and continues in numerous serpentines, steadily uphill to the Pleisenhütte, which invites you to take a break with its wonderful south-facing sun terrace.
This tour can also be extended with the mountain hike to the Pleisenspitze, 2,569 m.