The Lötschental is the largest valley on the northern side of the Rhône valley in the canton of Valais in Switzerland. It lies in the Bernese Alps, with the river Lonza running down the length of the valley from its source within the Langgletscher.
The picturesque valley extends about 27 kilometers (17 miles) from the Lötschenlücke (3178 m) at the top of the Langgletscher to the mouth of the valley at Steg/Gampel (630 m). It is surrounded by 3,000 meter high mountains, including the Bietschhorn (3,934 m), the Hockenhorn (3,293 m), the Wilerhorn (3,307 m) and the Petersgrat (3,205 m). The Jungfrau-Aletsch-Bietschhorn area is the most glaciated area in the Swiss Alps, and was declared a Natural World Heritage Site by decision of UNESCO on December 13, 2001, along with southern and eastern parts of the Lötschental. The main villages of the Lötschental are Wiler and Kippel, with 538 and 383 inhabitants respectively. Other villages in the valley include Ferden and Blatten. Altogether, the valley has approximately 1500 inhabitants.