Simmental is an alpine valley in the Bernese Oberland of Switzerland. It expands from Lenk to Boltigen, in a more or less south-north direction (Obersimmental), and from there to the valley exit at Wimmis near Spiez it takes a west-east orientation (Niedersimmental). It comprises the municipalities of Lenk, St. Stephan, Zweisimmen, Boltigen, Oberwil, Därstetten, Erlenbach, Diemtigen and Wimmis. The Simme flows through the valley.