Mae Hong Son province is located in the northwestern part of Thailand. The province is bordered by Shan State of Burma to the north, Chiang Mai and Lamphun provinces to the east, Tak and Mae Sariang provinces to the south, and the Salween River to the west. The province covers an area of 11,370 square kilometers and has a population of about 269,000. The provincial capital is Mae Hong Son town. The province is mostly mountainous with some valleys.
The highest mountain is Doi Inthanon at 2,565 meters. The province has many rivers, including the Pai, Mae Nam Khwae Noi, and Mae Nam Mo. The climate is cool and dry. The average annual temperature is about 18 degrees Celsius. The rainy season is from June to October. Mae Hong Son is a popular tourist destination. The main tourist attractions are the Doi Inthanon National Park, the Mae Hong Son loop, and the many Shan and Karen villages.