Piz Nair is a mountain of the Glarus Alps, located on the border between the Swiss cantons of Uri and Graubünden. Together with Piz Giuv on the west, it overlooks the end of the Etzli valley in the canton of Uri. The south-west and the south-east sides overlook respectively the small valleys of Val Giuv and Val Milà, both converging to the Rhine valley west of Sedrun (Graubünden).