Vlahina

Vlahina () or Vlaina (), meaning "Vlach Mountain" is a mountain range on the border of southwestern Bulgaria and eastern North Macedonia. The highest peak is Ogreyak, also known as Kadiytsa, at 1,924 m. Nearby towns include Simitli to the northeast in Bulgaria and Pehčevo to the southwest in North Macedonia.

== Geography == thumb|left|Komatinski Rocks, Bulgaria Vlahina is situated between the valley of the river Struma to the east that separate it from the mountain ranges of Rila and Pirin in Bulgaria, and the valley of the river Bregalnica to the west that separate it from Golak and Plačkovica in North Macedonia. To the northwest, entirely in Bulgarian territory, the valley of the Eleshnitsa, a right tributary of the Struma, and the Chernata Skala Saddle (930 m) form the connection with Osogovo, to the north the Skrino Gorge along the Struma separates it from Konyavska Planina, to the south the valley of the Sushichka reka and the Sedloto Saddle (1,619 m) link it to Maleshevo Mountain. Its northernmost part between the Eleshnitsa and the Struma is known as the Ruen Mountain. Within these boundaries Vlahina reaches a length of about 50 km in direction north–south, and the width varies between 12 km to the north and 30 km to the south.