sentences:  At the head of the Lötschental valley, the Lötschenlücke pass, into the valley of the Aletsch Glacier, forms the municipal boundary.Below this pass, the Langgletscher glacier occupies the Lötschental valley, whilst the Schwarzsee lake lies at a lower level.The valley is framed by the Tschingelhorn to the north and the Bietschhorn to the south, and the slopes of both mountains lie within the municipality.