Mae Chaem District split off to form the new district, Galyani Vadhana. Neighboring districts are (from the north clockwise) Galyani Vadhana, Samoeng, Mae Wang, Chom Thong and Hot of Chiang Mai Province, and Mae Sariang, Mae La Noi, Khun Yuam, Mueang Mae Hong Son and Pai of Mae Hong Son Province. Thailand's highest mountain, high Doi Inthanon, in the Thanon Thong Chai Range, is in Mae Chaem District. The district is divided into seven sub-districts ("tambon"), which are further subdivided into 85 villages ("muban"). Mae Chaem also has sub-district municipality ("thesaban tambon") status and covers parts of "tambon" Chang Khoeng. There are a
Highest unclimbed mountain Highest unclimbed mountain An unclimbed mountain is a mountain peak that has yet to be climbed to the top. Determining which unclimbed peak is highest is often a matter of controversy. In some parts of the world, surveying and mapping are still unreliable, and there are no comprehensive records of the routes of explorers, mountaineers and local inhabitants. In some cases, even modern ascents by larger parties have been poorly documented and, with no universally recognized listing, the best that can be achieved in determining the world's highest unclimbed peaks is somewhat speculative. Most sources indicate that Gangkhar Puensum ()