Bielerhoehe, Vorarlberg/Tyrol, alt. 2,037 m, pass in the district of Gaschurn between Gross- and Kleinvermunt, i.e. between the Ill (Montafon) and Trisanna (Paznaun) valleys, divides the Verwall from the Silvretta group. The bleak high mountain region became attractive to tourists with the opening of the Silvretta reservoir of the Illwerke (built in 1943, the dam wall is 432 m long and 80 m high) and the construction of the Silvretta-Hochalpenstrasse motorway (1954, 54 km long). Silvretta-Haus conference hotel (1993).