dull lake, Germanized: Trübsee Not the official spelling of the geographical objects (lake, pasture), but used for the naming of the cable car station and others ) is an Alpine lake ( 1764 meters ) on the Ober Trüebsee Alpine pasture (or often just incorrectly shortened to Trüebsee'') in the upper part of the extensive municipality of Wolfenschiessen in the Swiss canton of Nidwalden.