The Mat (definiteAlbanianform: Mati, Ancient Greek: Mathis, Μαθις) is a river in northern Albania. Its source is near Martanesh, in the Dibër County. It flows west towards the municipality Mat, which takes it name from the river, and northwest through the towns Klos and Burrel. About 10 km (6 mi) downstream from Burrel it flows into a large reservoir (Liqeni i Ulzës – "Lake Ulëz"). After passing through a hydroelectric dam, it flows through another, smaller reservoir (Liqeni i Shkopetit – "Lake Shkopet") and forms a narrow gorge through the mountain range that separates the Mat district from the coastal plains. It enters the plains between Milot and Zejmen.