This sub-group is located north of the Oberjoch saddle. The Iller valley forms its western boundary, the Ostrach valley delineates it to the south and the Vilstal valley to the east. The highest mountain is the Grünten, NN. These mountains offer a scenic backdrop for leisure activities, especially for hikers. They also have the advantage of being snow-free for longer than the adjoining subranges of the Allgäu Alps to the south. The mountains consist of four rock groups. In the northernmost ridges molasse is dominant. In places flysch is represented, as is main dolomite. And finally, there are the Schratten limestones of the Cretaceous period on the Grünten, making it a geological relative of the Hoher Ifen.