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
Highest unclimbed mountain peaks from subpeaks, there is no widely agreed standard. In 1994, the International Climbing and Mountaineering Federation (UIAA) classified 82 mountain peaks in the Alps whose summits were at least above sea level and with at least of topographic prominence over any adjacent mountain pass or col, as a distinct peak. It can be difficult sometimes to determine whether or not a mountain peak has been fully summited. Long before modern mountaineering commenced in the middle of the 19th century, evidence indicates that people did indeed travel up to the summits or near to the summits of major mountain peaks.