Whilst the Große Arnspitze and the Arnplattenspitze may be reached either from Mittenwald via the Riedberg or from Scharnitz on a partially exposed climbing route, the ridge path of the three peaks, including the Mittlere Arnspitze requires climbing expertise of grade II standard.
The Karwendelhaus in turn may be reached either from Scharnitz or from Hinterriß over the Kleiner Ahornboden.