Piz Tremoggia, Mountain summit on the Swiss–Italian border, Grisons and Lombardy

Piz Tremoggia (also Pizzo delle Tre Mogge) is a 3,441-metre mountain of the Bernina Range in the Rhaetian Alps, on the Italy–Switzerland border between Val Fex in Graubünden and Val Malenco in Lombardy. It closes the Bernina massif to the west and stands west of the higher Piz Glüschaint.

The sources record no founding event or border treaty for Piz Tremoggia; its documented history is cartographic. Italian maps name it Pizzo delle Tre Mogge, German and Romansh maps Piz Tremoggia, and the double name reflects the peak's position on the Italy-Switzerland line between Val Malenco and Val Fex. At 3,441 m it closes the Bernina Massif to the west, just west of the higher Piz Glüschaint.

The mountain carries two names: Piz Tremoggia in German-speaking Graubünden and Pizzo delle Tre Mogge in Italian, both referring to the three peaks or heaps of the summit ridge. The Italian name is used in Lombardy, the German one in the Grisons, so maps and signs on either side of the border differ.

Piz Tremoggia lies on the Italy–Switzerland border between Val Fex in Graubünden and Val Malenco in Lombardy, so approaches start from villages on either side. The summit stands at 3,441 m, and the mountain closes the Bernina Massif to the west, just west of the higher Piz Glüschaint. Plan for high-altitude conditions and check the weather before setting out.

The Italian name Pizzo delle Tre Mogge means "peak of the three nuns"; the German name Piz Tremoggia derives from it. The summit closes the Bernina Massif to the west, standing just west of the higher Piz Glüschaint (3,594 m).