The Ceahlau Massif is one of the most renowned mountain ranges of Romania. It is located in the Eastern Carpathians chain, in Neamţ County, in the Moldavia region. The two most important peaks are Toaca (1904 m altitude) and Ocolaşul Mare (1907 m altitude). It is bounded to the east by the Bistriţa River and Lake Bicaz, to the south by the Bicaz River.