 The Nagelfluhkette extends throughout the western part of the Allgäu Alps west of the Illertal, in which the Bavarian cities Sonthofen and Immenstadt lie.Between these cities is Blaichach, from where the mountain range stretches for about 20 km in west-southwest direction to the Vorarlberg community of Hittisau.The German-Austrian border runs along the saddle of the mountain ridge between Hohenfluhalpkopf and Hochhäderich (Hoher Häderich).