The
Haliacmon (
Modern Greek: Αλιάκμονας,
Aliákmonas; formerly: ,
Aliákmon or
Haliákmōn;
Slavic:
Бистрица,
Bistrica;) is the longest river in
Greece, with a total length of .(In Greece there are two rivers longer than Haliakmon,
Maritsa (in Greek
Εβρος) and
Vardar (in Greek
Αξιός), 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).
