The Aras (Persian: ارس‎), also known as Araks (Armenian: Արաքս), Yeraskh (Classical Armenian: Երասխ), Araxes (Greek: Αράξης), Aras (in Turkish and Kurdish), Araz (in Azerbaijani), is a river in and along the countries of Turkey, Armenia, Azerbaijan, and Iran. It drains the south side of the Lesser Caucasus Mountains and then joins the Kura River which drains the north side of those mountains. Its total length is 1,072 kilometres (666 mi).