 The Volga River (built as the Uglich Reservoir) makes the western border of the district, and the whole area of Kalyazinsky District is flat and belongs to the drainage basins of the right tributaries of the Volga.The central and the southern parts of the district belong to the basin of the Nerl River, whereas the rivers in the northern part mainly drain into the Zhabnya River.The town of Kalyazin is located at the mouth of the Zhabnya.