Pai is a small town (pop. 3000) in Mae Hong Son Province, Northern Thailand. It is part of the Mae Hong Son Loop, which is route 1095 from Chiang Mai to Mae Hong Son. The city is named after the Pai river.
Pai is a predominantly tourism-oriented town, offering a relaxed atmosphere with a broad traveller and backpacker scene. In early 2006 a sudden boom in guesthouse and bar construction has resulted in a great deal of spare capacity — capacity that is partially taken up by an increase in Thai people visiting after Pai was featured in a romantic Thai film. There are now around 200 guesthouses and hotels in Pai, and the city center has transformed into containing western style restaurants, souvenir shops, and bars that cater largely to the now significant influx of tourists and package tours.