Haliacmon

The Haliacmon (Greek: Αλιάκμονας, Aliákmonas; formerly: Ἁλιάκμων, Aliákmon or Haliákmōn) is the longest river flowing entirely in Greece, with a total length of 297 km (185 mi). In Greece there are three rivers longer than Haliakmon, Maritsa (Greek: Έβρος), Struma (Strymónas), both coming from Bulgaria, and Vardar (Greek: Αξιός) coming from North Macedonia, but the length of each one of them in Greek territory is less than that of Haliakmon, which flows entirely in Greece. Haliacmon is the traditional English name for the river, but many sources cite the formerly official Katharevousa version of the name, Aliákmon. Today, the only official variant is the demotic Aliákmonas. It flows through the Greek regions of West Macedonia (Kastoria, Grevena and Kozani regional units) and Central Macedonia (Imathia and Pieria regional units). Its drainage basin is 8,813 km² (3,403 sq mi).