Doi Nang Non Doi Nang Non Doi Nang Non (, ; 'Mountain of the Sleeping Lady') is a mountain range in the Thai highlands in Chiang Rai Province, Thailand. It is a karstic formation with numerous waterfalls and caves rising at the southern end of the Daen Lao Range. Part of its area is managed as the Tham Luang–Khun Nam Nang Non Forest Park (). Doi Nang Non consists of a long hill tract that lies on the west side of the highway between Chiang Rai and Mae Sai. The greater part of the range is in Mae Sai District, extending west and
Doi Luang National Park District, should not be confused with Doi Luang, with an altitude of 1,694 m the highest mountain of the Phi Pan Nam Range, that is located about 30 km further south in the same mountain chain. The sources of the Wang and the Lao River are in this mountainous area. The park also has rugged rock formations and scenic waterfalls such as Namtok Pu Kaeng, Namtok Cham Pa Thong and Namtok Wang Kaew. Trees in the protected area include "Mesua ferrea", "Hopea odorata", "Toona ciliata", "Lagerstroemia tomentosa" and "Irvingia malayana". Animals in the park area include the Asian black bear,