Pai is the northeasternmost district of Mae Hong Son province, northern Thailand. The central town is Pai. The Daen Lao Range dominates th…Pai is the northeasternmost district of Mae Hong Son province, northern Thailand. The central town is Pai. The Daen Lao Range dominates the landscape of this district. Neighboring districts are: Mueang Mae Hong Son, Pang Mapha of Mae Hong Son Province; Shan State of Myanmar; Wiang Haeng, Chiang Dao, Mae Taeng, Samoeng, and Galyani Vadhana of Chiang Mai province.