Vihren is the highest peak of Bulgaria’s Pirin Mountains. Reaching 2,914 metres (9,560 ft), it is Bulgaria’s second and the Balkans’ third highest, after Musala and Mount Olympus. Although due to the karst topography Vihren is deprived of lakes and streams, a number of Pirin’s lakes are located around the peak, as is Europe’s southernmost glacial mass, the Snezhnika glacielet. Until 1942 Vihren was known as Eltepe (peak of storms); it was also called Buren (stormy) and Malnienosets(lightning-bringer).

Vren is situated in the northern subdivision of Pirin on the mountain’s main ridge between the summits of Kutelo (2,908 m) to the north-west and Hvoynati Vrah (2,635 m) to the south-east. It is connected with these two peaks via the saddles of Premkata (2,610 m) to the north and Kabata (2,535 m) to the south. The summit is located between the valleys of the rivers Vlahina reka of the Struma drainage to the west and Banderitsa of the Mesta drainage to the east.

Seen from the town of Bansko, situated at the foothills of Pirin to the north-east of Vihren, the peak looks like a truncated pyramid, and from the south — like а tetrahedral pyramid.The summit is built up marbles and has a karst topography which determines the lack of streams and lakes around Vihren. 

The tour is 6-7 hours – hard level.