River Aire is a prominent waterway in Yorkshire, England. It is a tributary of the River Ouse and flows through Leeds, Bradford, and other cities in West Yorkshire. The River Aire has many synonyms that are used to describe it, including Aire, Aire River, Aire Valley, and River of Aire. Its name is derived from the Celtic word for 'oak' or 'wood', which refers to the oak forests that once covered the valley. The River Aire is an important source of water for drinking and industrial purposes, and it is also popular for recreation activities such as canoeing and fishing.