The Thyamis, also known as Glykys or Kalamas, is a river in the Epirus region of Greece. It flows into the Ionian Sea. It is 115 km (71 mi) long, and its drainage area is about 1,800 km2 (690 sq mi), over 99% of which on Greek territory.
The source of the river is near the village Kalpaki, in the northwestern part of the Ioannina regional unit. It flows south at first, and turns southwest near Soulopoulo. It receives its tributary Tyria near Vrosina, and turns west near Kyparisso in Thesprotia, where the hydroelectric dam is located. It empties into the Ionian Sea near the village Kestrini, between Igoumenitsa and Sagiada, close to the Albanian border.
Places along the river include, from source to mouth: Mazaraki, Soulopoulo, Vrosina, Raveni, Pente Ekklisies, Kyparisso, Parapotamos and Kestrini.
