Lunghin Pass, Mountain pass in Bregaglia, Switzerland.

Lunghin Pass is a mountain passage at 2645 meters elevation in the Swiss Alps, connecting different valleys through steep trails and rocky terrain. The route is marked by varied topography, with rock formations and alpine features that define the entire journey.

The pass lies on the old route between the Oberengadin and the Septimer Pass, which for centuries carried traffic over the Alps; the Septimer route below it was the historic crossing, reached from Bivio, Casaccia or Juf. The watershed point itself sits about 150 metres north of the saddle, where a ridge branches west over the Motta da Sett (2637 m) toward the Septimer. The pass forms the municipal boundary between Bregaglia and Surses.

The name Lunghin is traced to the Italian surname Longhini. Hikers reach the pass on the Senda Segantini, a themed trail linking the late working sites of the painter Giovanni Segantini, and on a section of the national mountain route running from the Bernina Pass into the Oberhalbstein. Routes come from Maloja, Sils Baselgia, Casaccia, Bivio and Juf.

The ascent from Maloja takes several hours and leads through varied terrain with different difficulty levels. Good footwear and plenty of water are essential, as there is little shelter from weather and sun along the way.

This location is Europe's only place where three watersheds meet, with water flowing to three different seas. Rain here can reach the North Sea, the Adriatic, or the Black Sea depending on which side it falls.