The Bös Fulen is a mountain in the Schwyz Alps , located on the border between the cantons of Schwyz and Glarus . It overlooks the valleys of Muotathal (Schwyz) and Linthal. It is the highest summit of the Canton of Schwyz . Politically, it is split between the municipalities of Muotathal (Schwyz) and Glarus. Braunwald is the nearest locality.