Rhodope (rŏdˈəpē) [key], Bulg. Rodopi Planina, Gr. Rodope, mountain range of the Balkan Peninsula, extending c.200 mi (320 km) from the Struma River, SE Bulgaria, to the lower Maritsa River, NE Greece. It consists of three sections—the Rhodope, Pirin Planina, and Rila Planina—and its highest peak, Musala, rises to 9,596 ft (2,925 m). The rugged range has few passes and has long hindered communications between the upper Maritsa valley and the coastal plain.