By the Prantneralm parking lot following the forestal road (mark 3) to the Riedberg mountain hut. Furterhon on the wide mountain trail 11 to the Hühnerspielhütte mountain hut. Here turn right and follow upwards trail 22, which will bring you to the Amthorspitze summit (2753m). Lunch possibilities: Riedbergalm, Hühnerspielhütte, Prantneralm.