The Pamir-Alay (also Pamiro-Alay, ) is a mountain system in Tajikistan, Kyrgyzstan and Uzbekistan, encompassing four main mountain ranges extending west from the Tian Shan Mountains, and located north of the main range of Pamir. They are variously considered part of the Tian Shan, of the Pamir, or a separate mountain system. The term Pamiro-Alay is also used to refer to the mountain region encompassing the Pamir, the Pamir-Alay proper (then referred to as Gissaro-Alay) and the Tajik Depression.