Corno di Dosdè, Mountain summit in Lombardy, Italy

Corno di Dosdè is a mountain summit in the Livigno Alps that rises to 3,232 meters (10,603 feet). It stands on the border between Italy and Switzerland and features a secondary western peak at a lower elevation.

The mountain has served as a geographic landmark since the border between Italy and Switzerland was established. Its eastern face overlooks the Poschiavo Valley, a feature that has shaped the region's story.

The name Dosdè appears on both sides of the border: the Italian Corno di Dosdè and the Swiss Piz Dosdè above Poschiavo share one massif. Herders from Valdidentro and the Poschiavo valley have long moved livestock between the two slopes, and the ridge path linking the main summit with the 3,162 m border summit is still walked by hikers crossing between Lombardy and Graubünden.

The summit lies on the Italian-Swiss border, with the main top at 3,232 m and a secondary summit of 3,162 m to the west. The border runs along that western shoulder, so approach routes from the Valdidentro side and the Poschiavo side meet there. The Chinese source gives an average annual rainfall of 1,386 mm, so wet weather is frequent.

The international border does not cross the main summit: it runs over a secondary top, 3,162 m high, west of the 3,232 m summit. Walkers on the Italian side can therefore stand on the main peak without entering Switzerland.