The Central Russian Upland (also Middle Russian Upland and East European Upland) is an upland area of the East European Plain and is an undulating plateau with an average elevation of 230–250 m (750–820 ft). Its highest peak is measured at 293 m (961 ft). The southeastern portion of the upland known as the Kalach Upland. The Central Upland is built of Precambrian deposits of the crystalline Voronezh Massif.