La Rösa

La Rösa is a hamlet in the upper part of the Val Poschiavo in the canton of Graubünden, Switzerland. It lies at 1,880 metres (6,170 ft) above sea level on the southern approach to the Bernina Pass, and is in the municipality of Poschiavo, some 9 kilometres (5.6 mi) north of the village of the same name. Because of the 860 metres (2,820 ft) elevation difference between the two villages, the distance between them by road is 12 kilometres (7.5 mi). The upper reaches of the Poschiavino river flow through the hamlet.

La Rösa occupies a narrow shelf on the southern slope of the Bernina watershed, just above the tree line. The hamlet straddles the canton road H29, which climbs from Poschiavo to the 2,328 m Bernina Pass with gradients of up to 10 %. A small bridge at the north end carries the road over the young Poschiavino; at this point the stream's mean discharge is only about 0.4 cubic metres per second, but peak snow-melt floods can fill the channel bank-to-bank in June.