The Maritsa, Meriç or Evros(Bulgarian: Марица, Maritsa; Ancient Greek: Ἕβρος, Ebros; Modern Greek: Έβρος Evros; Latin: Hebrus or Hebrus, Romanized Thracian: Evgos or Ebros; Turkish: Meriç) is, with a length of 480 km, the longest river that runs solely in the interior of the Balkans. It has its origin in the Rila Mountains in Western Bulgaria, flowing southeast between the Balkan and Rhodope Mountains, past Plovdiv and Parvomay (where the Mechka and the Kayaliyka join it) to Edirne, Turkey.