Piz Mundin, Mountain peak in Samnaun Alps, Switzerland.

Piz Mundin is a 3,146-metre summit in the Samnaun Alps, on the border between Samnaun and Martina in Graubünden. Its long ridge runs from southwest to northeast, with the main summit roughly in the middle and the sharp Clucher dal Mundin (3,120 m) to the northeast. The mountain lies in Bündnerschiefer rock with large ophiolite layers.

The first recorded ascent took place on June 22, 1849, when Johann Coaz and Jon Rag Tscharner reached the summit, marking an important moment in Swiss alpine exploration. This early climb reflects the growing mountaineering activity in 19th-century Switzerland.

The name Piz Mundin derives from Romansh; the German form Mondiner Berg was also used, and older spellings include Piz Mondin and Mundyn. From the early modern period until 1868 the summit and its flanks were part of the Novellaberg dispute between Tirol and Graubünden, later Austria and Switzerland.

The usual route starts from the Val Sampuoir up to the Fuorcla d'Alp pass; from there the south-west ridge leads to the summit at difficulty ZS (fairly difficult). Another approach comes from the Inntal in the south via the Alp Tea (Schleinser Alm) onto the ridge between Piz Mundin and Piz Malmurainza. The mountain lies in Bündnerschiefer with ophiolite layers, so the rock calls for careful route-finding.

The summit lies in Bündnerschiefer rock with large ophiolite layers, and the long ridge carries the jagged Clucher dal Mundin needle at 3,120 m. The peak was first climbed on 22 June 1849 by Johann Wilhelm Coaz and Jon Rag Tscharner.