The Pirin Mountains are a mountain range in southwestern Bulgaria, with Vihren (2,914 m high) the highest peak, situated at 41�45?50?N 23�25?30?E. The range extends about 40 km northwest-southeast, and about 25 km wide. Most of the range is protected in the Pirin National Park. The mountain is named after Perun, the highest god of the Slavic pantheon and the god of thunder and lightning
