Bregaglia Valley (Grisons, Switzerland)

Bregaglia is an alpine valley of Switzerland and Italy at the base of which runs the river Maira.

Most of the valley falls within the Swiss district of Maloja in the canton of the Grisons, the lower part within the Italian province of Sondrio. The valley includes the Swiss former municipalities of Vicosoprano, Stampa, Bondo, Soglio and Castasegna (now consolidated into the municipality of Bregaglia); and the Italian municipalities of Villa di Chiavenna, Piuro, and Chiavenna.

The valley begins at the Maloja Pass (1815 m) which connects it to the Engadin (the valley of the Inn, which is part of the Danube basin). There the river Orlegna extends westwards and joins the river Mera to Chiavenna shortly after which the Mera joins with the Liro and turns south towards Lake Como. From Chiavenna to Maloja, a distance of 32 km, the valley rises 1482 m.

In this valley sources of three important basins have their origin: the Rhine (through the Avers Rhine), which runs to the North Sea, the Inn, which runs to the Danube (near Passau), and the rivers Mera and Adda, which run to the Po.