Doi Phu Nang National Park Doi Phu Nang National Park Doi Phu Nang National Park () is a national park in Dok Khamtai, Pong and Chiang Muan Districts, Phayao Province, Thailand. It is located in two mountain chains of the Phi Pan Nam Range, Mae Yom and Nampi, with a not-protected area in between. There are both mixed evergreen forests, dipterocarp forest and dry deciduous forests in the park area. Doi Phu Nang, the mountain that gives its name to the park, with an altitude of 1,202 m, is the highest peak in the area. The sources of two tributaries of the Yom River are
Doi Kham be reduced to ashes. Also, the number of people growing opium poppies was increasing. At the king's command, the royal project was created to provide alternative sources of income for hill tribe villages that formerly relied on opium production and swidden agriculture. The meaning of the words "Doi Kham" comes from two northern Thai words. The word "doi" means 'mountain' or 'hill' while the word "kham" is a shortened word for "thongkham" which means 'gold'. The Royal Project Foundation operates four research stations and thirty-five development centres that work with 295 villages containing 14,109 families. Involved are approximately 85,000 rural