Chiang Mai Province of approximately . The mountains of the Daen Lao Range () at the north end of the province, the Thanon Thong Chai Range () stretching in a north-south direction, and the Khun Tan Range in the east of the province are covered by rain forest. The Mae Ping, one of the major tributaries of the Chao Phraya River, originates in the Daen Lao mountains. The highest mountain in Thailand, Doi Inthanon at , is in Chiang Mai Province. Several other national parks are also in the province: Doi Suthep-Pui, Ob Luang, Sri Lanna, Huai Nam Dang, Mae Wang, and Pha
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,