The Reisseck Group is predominantly formed of gneisses. The highest peak in the mountain range is the Reißeck at m (AA). Other significant summits are the Tristenspitz (2,930 m), the Hohe Leier (2,774 m) and the Gmeineck (2,592 m). The Kaponig valley in the northwestern Reisseck Group has been part of the High Tauern National Park since 2005.