Bulgaria–North Macedonia border

Belasica (Macedonian and Bulgarian: , also translit. Belasitsa or Belasitza, Ottoman Turkish: بلش Turkish: Beleş), Belles (, Bélles) or Kerkini (, Kerkíni;), is a mountain range in the region of Macedonia in Southeastern Europe, shared by northeastern Greece (about 45%), southeastern North Macedonia (35%) and southwestern Bulgaria (20%).

mountain in Bulgaria

mountain in Bulgaria

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.

peak located in Belasica mountains in the region of Macedonia

highest peak of Osogovo Mountain