It straddles Fang, Mae Ai, and Chai Prakan Districts of Chiang Mai Province.

The park covers 327,500 rai ~ 524 square kilometres (202 sq mi)[2] of the mountain area of the Daen Lao Range, at the border with Myanmar.

The tallest peak is Doi Pha Hom Pok at 2,285 metres (7,497 ft), the second highest in Thailand.

[4] Doi Pha Hom Pok National Park is mostly covered with forest, where tree species such as Hopea odorata predominate with rare plant species such as Impatiens jurpioides and butterflies such as Teinopalpus imperialis and Meandrusa lachinus.

Doi Lang, located within the park, is an excellent area for birdwatching.