Doi Suthep-Pui used to be known as Doi Oi Chang. Its new name comes from the name of a hermit, Prarusiwasuthep who lived at Doi Suthep-Pui was a protected forest. In 1973, The Royal Forest Department decided that Doi Suthep and 13 other forest areas in the country should eventually be national parks. The Royal Forest Department sent Mr.Panya Boonsomboon to survey the area.
After that, the national park committed decided that only forest in good condition should be included in Doi Suthep-Pui National park and areas occupied by villagers should be excluded. In 1981, as the 24th national park of Thailand which encompasses 161.06 square kilometers. The following year, an additional 100 square kilometers were annexed to the park, bringing the total to 261.06 square kilometers.
Doi Suthep, Doi Buakha and Doi Pui are the three main peaks in the park. The highest peak, Doi Pui, rises to 1,685 meters above mean sea levels.
Because of the high altitude, the weather on the upper slopes of the mountains is cool and pleasant all year even in hot season, average temperature is about 20 - 23 degree celsuis. In the cool season, the air is cold and clear. Temperature can drop as low as 6 degree celsuis in February, August and September are the wettest months with rain falling daily.
There are two basic types of forest on the mountain: Deciduous forest below about 1,000 m elevation and evergreen forest above. The deciduous is further divided into two kinds, deciduous dipterocarp-oak Forest in the driest areas and mixed evergreen deciduous forest along streams and gullies. Common species are trees of the families Dipterocarpaceae, Fagaceae and Magnoliaceae.
Wildlife in the park includes common muntjac, wild boar, macaque and other small mammals. More than 300 species of birds can be seen here, including red junglefowl, pheasants, eagles, parrots, bulbuls and minivets. Rare species of amphibian, the crocodile salamander that can be found in only four localities in Thailand, one in Doi Suthep.