The Arnspitze Group is part of the Northern Limestone Alps and belongs tectonically to the Inn Valley range (Inntaldecke), only the northernmost part from the Riedberg ridge (Riedbergscharte) is part of the Lech Valley range (Lechtaldecke). The Arnspitze Group is, for the most part, made up of rocks of Wetterstein limestone, which dip towards the southeast. In the area of the Hoher Sattel, a band of Raibler strata runs from west to east, while the Zunteregg, which is 1682 m above sea level and lies south of the Arnspitze, is made of main dolomite (Hauptdolomit) rock. Lead used to be mined at the foot of the Große Arnspitze. The mine lay on Bavarian territory just north of the Austrian border in the Isar valley, at the southwestern end of the Riedboden.