The Val Calanca is a valley of the Swiss Alps , located in the Lepontine Alps . The valley is drained by the Calancasca , a tributary of the Moesa (Ticino basin), at Roveredo . The highest mountains surrounding the Val Calanca are the Puntone dei Fraciòn (3,202 metres) and the Zapporthorn (3,152 metres).

The valley extends 26km from North to south. The valleys main river is the Calancasca. The Lago de Calvaresc is located within the Natural park, east of Rossa.