Belasica (Macedonian and Bulgarian: Беласица (help·info), also translit. Belasitsa or Belasitza, Ottoman Turkish: بلش Turkish: Beleş), Belles (Greek: Μπέλλες, Bélles) or Kerkini (Κερκίνη, Kerkíni;), is a mountain range in the region of Macedonia in Southeastern Europe, shared by northwestern Greece (about 45%), southeastern North Macedonia (35%) and southwestern Bulgaria (20%).
|Elevation||2,029 m (6,657 ft)|
|Native name||Bulgarian and Macedonian: Беласица - Greek: Μπέλλες or Κερκίνη|
|Countries||Bulgaria, Greece and North Macedonia|
The mountain range is about 60 km (37.28 mi) long and 7 to 9 km (4.35 to 5.59 mi) wide and is situated just northeast of Dojran Lake. The highest point is Radomir (Kalabak) at 2,029 m, with elevation otherwise ranging between 300 and 1900 m above sea level. The borders of all three countries meet at Tumba Peak. The climate in the area shows strong Mediterranean influence.
The area of Belasica became a euroregion in 2003. Two football teams are named after the mountain range, PFC Belasitsa from the nearby Bulgarian town of Petrich and FC Belasica from Strumica in North Macedonia.
During antiquity its name was Órbēlos (Ὄρβηλος). According to the ancient authors it was a mountain range in the border area between Thrace and Macedonia. It is generally equated today with the modern Belasica. The name Órbēlos is probably derived from the ancient Thracian/Paionian toponym of the mountain, which means shining mountain, from 'belos' - blazing or shining and 'or' - mountain. It was known for its Dionysos cult. 
View of Belasica mountain range from Lake Kerkini
- Belasitsa. Tourist map, Sofia, 2006.
- Благоевъ, Т. А. Бѣласица. София, 1925.
- Динчев, Евг., Атанасов, П. Високите планини на Република Македония. Пътеводител, София, 1998, стр. 214-224.
- "Енциклопедия Пирински край". Том 1, Благоевград, 1995, стр. 78.
- Rumeli-i Şahane Haritası, Harvard Map Collection, Ottoman Empire Series, Index Map, 1:210,000 Scale, c. 1901/1902, http://iiif.lib.harvard.edu/manifests/view/drs:4952983$17i Retrieved 17.05.2016
- The Cambridge Ancient History: The Assyrian and Babylonian Empires and Other States of the Near East, from the Eighth to the Sixth Centuries B.C., Nicholas Geoffrey, Lemprière Hammond, Cambridge University Press, 1995, ISBN 0521227178, p. 594.
-  D. C. Samsaris, Historical Geography of Eastern Macedonia during the Antiquity (in Greek), Thessaloniki 1976 (Society for Macedonian Studies), p. 13. ISBN 960-7265-16-5.
- (Hdt. 5,16; Str. 7a,1,36; Arr. Anab. 1,1,5)
- Brill Online Reference Works - Orbelus von Bredow, Iris (Bietigheim-Bissingen).
- Beiträge zur Namenforschung, C. Winter., 1995, S. 241-242.
- T. Spiridonov, Istoričeskata geografija na trakijskite plemena, 1983, 24 f., 118.