As the southern part of the Ankogel Group, it belongs to the High Tauern range of the Central Eastern Alps.

Its eastern boundary is formed by the Malta and Lieser rivers with the town of Gmünd, separating it from the Gurktal Alps (Nock Mountains).

The Kaponig valley in the northwestern Reisseck Group has been part of the High Tauern National Park since 2005.

In the Reisseck Group there are numerous mountain lakes, of which the Radlsee (Hoher See), the Hochalmsee (Spapniksee), the Zwenberger See and Mühldorfer See are the most important.

The water is used by the Reißeck-Kreuzeck Hydropower Group to supply the hydroelectric power plants in the Reißeck municipality.