Country/territory: Bulgaria
Central coordinates (latitude / longitude): 42°43'01"N (42.7172°) / 024°58'01"E (24.9672°)
Area (reported): 166,678 hectares / 1,666.78 km² / 411,870 acres / 643.55 square miles
Area (GIS-derived): 166,741 hectares / 1,667.41 km² / 412,026 acres / 643.79 square miles
Altitude: 373–2376 m (1,224–7,794 ft)