Doi Nang Non (Thai: ดอยนางนอน; "Mountain of the Sleeping Lady") is a mountain range of the Thai highlands located in Chiang Rai Province, Thailand. It is a karstic formation part of the southern end of the Daen Lao Range with numerous waterfalls and caves. Part of its area is managed as the Tham Luang–Khun Nam Nang Non Forest Park (วนอุทยานถ้ำหลวง-ขุนน้ำนางนอน).