The Bohemian Forest, known in Czech as Šumava and in German as Böhmerwald, is a low mountain range in Central Europe. Geographically, the mountains extend from Plzeň Region and the South Bohemian Region in the Czech Republic to Austria and Bavaria in Germany, and form the highest truncated uplands of the Bohemian Massif, up to 50 km wide. They create a natural border between the Czech Republic on one side and Austria and Germany on the other.