The Crișul Negru (Black Criș) (Romanian), (Hungarian: Fekete-Körös) is a river in western Romania (Transylvania) and south-eastern Hungary. The river has its source in the western Apuseni Mountains of Romania. Flowing through the Romanian towns of Ștei and Beiuș and crossing the border of Hungary, the river, now called Fekete-Körös, joins the Fehér-Körös a few kilometres north from Gyula to form the Körös river. In Romania, its length is 164 km (102 mi) and its basin size is 3,820 km2. Part of the water from the river Crișul Repede is diverted towards the Crișul Negru by the Criș Collector Canal.
