The Niesen is a mountain of the Bernese Alps in Switzerland. It overlooks Lake Thun, in the Bernese Oberland region, and forms the northern end of a ridge that stretches north from the Albristhorn and Mannliflue, separating the Simmental and Kandertal valleys.Administratively, the summit is shared between the municipalities of Reichenbach im Kandertal, to the south-east, and Wimmis, to the west and north.