Valendas had an area, , of . Of this area, 21.6% is used for agricultural purposes, while 48.7% is forested. Of the rest of the land, 1.8% is settled (buildings or roads) and the remainder (27.9%) is non-productive (rivers, glaciers or mountains). It is located above the right side of the Vorderrhein canyon. It consists of the "haufendorf" village (an irregular, unplanned and quite closely packed village, built around a central square) of Valendas and the hamlets of Carrera, Brün, Dutjen and Turisch.