Piz Sezner, Mountain summit in Graubünden, Switzerland

Piz Sezner is a mountain in the Lepontine Alps reaching 2,310 meters, situated between the Rhine Valley and Val Lumnezia. The terrain features steep slopes and rocky surfaces throughout.

Piz Sezner lies between the main Rhine valley and the Val Lumnezia. Its north slope belongs to Obersaxen, settled by Walsers and German-speaking, while the south side faces the Romansh villages of Morissen, Cumbel and Lumbrein. The summit area is part of a winter ski area, with a cable car station west of the top at 2,269 metres.

The mountain sits on a language border: the north slope belongs to Obersaxen, settled by German-speaking Walsers, while the south side faces the Romansh villages of Morissen, Cumbel and Lumbrein in Val Lumnezia. A visitor crossing the summit passes between these two speech communities.

A cable car station at 2,269 meters provides year-round access to the mountain for hikers and skiers. In both summer and winter seasons, visitors can use the station to reach higher elevations quickly.

The summit's gentle profile, lacking a steep final pitch, makes it a popular destination for mountain-bike tours; riders climb from Obersaxen on the German-speaking north side. The 2,269-metre cable-car station stands west of the top.