The Vier-Quellen-Weg, or Four Sources Trail, is a renowned 81-kilometer hiking route in the Swiss Gotthard massif, guiding adventurers to the origins of four major European rivers: the Rhine, Reuss, Ticino, and Rhone. This trek traverses diverse landscapes across the cantons of Graubünden, Uri, Ticino, and Valais, offering hikers a unique opportunity to experience the varied terrains from the Oberalp Pass to the Furka Pass.