The Boyanska reka is a river in western Bulgaria

Bulgaria

Bulgaria , officially the Republic of Bulgaria , is a parliamentary democracy within a unitary constitutional republic in Southeast Europe. The country borders Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, as well as the Black Sea to the east...

, a tributary to Vladayska River.

The river flows from the northern slopes of Cherni Vrah

Cherni Vrah

Cherni Vrah is the summit of Vitosha Mountain in Bulgaria. Rising to 2290 m, the peak is the fourth highest mountain summit in the country after Musala , Vihren , and Botev Vrah .Cherni Vrah is bounded to the northwest by Torfeno Branishte which — like the extensive adjacent...

 on Vitosha Mountain

Vitosha

Vitosha is a mountain massif, on the outskirts of Sofia, the capital of Bulgaria. Vitosha is one of the tourists symbols of Sofia and the closest site for hiking, alpinism and skiing. Convenient bus lines and rope ways render the mountain easily accessible. Vitosha has the outlines of an enormous...

, crossing Torfeno Branishte

Torfeno Branishte

Torfeno Branishte is a nature reserve on Vitosha Mountain in Bulgaria, along with the Bistrishko Branishte reserve. The reserve has a surface area of 728.8 ha comprising the parts of Big Plateau and the Kapaklivets Plateau between the peaks of Cherni Vrah , Ushite , and Chernata Skala ,...

 Nature Reserve; at the northern foothills of Vitosha the river drops forming the Boyana waterfall and then crosses the village of Boyana

Boyana

Boyana is a neighbourhood of the Bulgarian capital of Sofia, part of Vitosha municipality and situated 8 km south of the city centre, in the outskirts of Vitosha. Boyana is typically regarded as one of the best and most expensive neighborhoods of Sofia to live in...

 (part of Sofia

Sofia

Sofia is the capital and largest city of Bulgaria and the 12th largest city in the European Union with a population of 1.27 million people. It is located in western Bulgaria, at the foot of Mount Vitosha and approximately at the centre of the Balkan Peninsula.Prehistoric settlements were excavated...

, from which the river takes its name) to flow into Vladayska River in the Sofia district of Ovcha Kupel.