The Urnerboden is a village in the high valley of Urner Boden, and also an alp and a small high Alpine permanent settlement in the Swiss canton of Uri. At 8 kilometres (5.0 mi) in length, it is believed to be the largest alp in Switzerland. It forms a disconnected part of the municipality of Spiringen, separated from the rump of that municipality by some 8 kilometres (5.0 mi) of the municipality of Unterschächen and by the Klausen Pass.