Piz Nair (3,059 m) is a mountain of the Glarus Alps, located on the border between the Swiss cantons of Uri and Graubünden. Together with Piz Giuv (3,096 m) 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). The mountain is politically divided between the municipalities of Silenen (Uri) and Tujetsch (Graubünden).