Stara Planina

The Balkan mountain range (Bulgarian: Стара планина, Serbian: Stara Planina, "Old Mountain") is an extension of the Carpathian mountain range, separated from it by the Danube River.
The range runs 560 km from eastern Serbia eastward through central Bulgaria to Cape Emine on the Black Sea.
The highest peak on the Balkan peninsula is Musala in the Rila mountains near Sofia (Rila range) with 2,925 m, closely followed by Mount Olympus in Greece and Vihren (Pirin range).
The highest peaks of the Stara Planina itself are in central Bulgaria. The highest peak is Botev (2,376 m), located in the Central Balkan National Park (established 1991).
http://en.wikipedia.org/wiki/Stara_Planina