The Alay Valley (Kyrgyz: Алай өрөөнү) is a broad, dry valley running east-west across most of southern Osh Province, Kyrgyzstan. It is surrounded by the Alay Mountains in the north, and the Trans-Alay range to which it provides access to Pik Lenin (7134m) and other climbable peaks.
The valley is popular with mountaineering tourists of various levels as the relatively easy +7000 Peak Lenin is commonly accessed from the Kyrgiz side of the valley. A base-camp south of Sary-Moghul is accessible in summer. Trekking tours in the Alay Mountains over-looking the valley can be organised upon arrival for non-hard-core mountaineers, and more elaborate cross-mountain tours can arrive in Alay Valley from the Kyrgiz Ferghana.
The valley is around 150 km in length and 50 km from side to side, and due to its proximity to China the valley was deemed a sensitive border area during Soviet times. Locals who have not left to seek work elsewhere live mostly from cattle and farming.