Doi Inthanon The area covered by the Chom Thong District, Mae Wang District and Doi Chiang Mai. An area of 482.4 square kilometers or 301,500 acres comprising the mountain complex. There Doi Inthanon, which is part of the Himalayas. Across from Nepal, Bhutan, Myanmar, is the highest peak in Thailand.Terrain consists of mountains. Doi Inthanon is the highest peak at 2,565 meters