The Evinos is a 92 km long river in western Greece, flowing into the Gulf of Patras. Its source is in the northern Vardousia mountains, near the village Artotina, Phocis. The river flows in a generally southwestern direction, for most of its length in Aetolia-Acarnania. It feeds the reservoir of Lake Evinos, that is about 10 km². The river flows through a deep forested valley with few small villages. In its lower course it flows through lowlands, and it empties into the Gulf of Patras 10 km southeast of Missolonghi. The village Evinochori near its mouth owes its name to this river.