Pai River Pai River is the biggest and longest river in Maehongsorn province. The origin of the river occurs from TanonThongchai and Dan Laos mountain range. The river flows pass the valley in the north to the south pass 3 Amphurs of Maehongsorn province; AmphurPai, Amphur Pang Mapum and AmphurMuang and combined together with Salawin River in Myanmar. Pai River is 180 kilometers long and 30 meters wide and 7 meters at the deepest. The floor of the river consists of pebbles. The water is cool all year with swiftly flowing in the rainy season. The popular activity for the tourists is rafting. The difficulty ranges from 2-3 during October-February and ranges from 3 -5 during June-September. There are 2 routes; the first route starts from AmphurPai and ends at Mae Surin Waterfall, Baan Pang Moo, AmphurMuang which is 70 kilometers altogether; the second route starts at Kong River, which is a branch of Pai River, and ends at Mae Surin Waterfall too which is 55 kilometers altogether. Apart from the beautiful scenery, there are also other locations worth visiting such as waterfall, hot mineral spring, cave, cliff etc. There is also a gentle rafting activity and long-tailed boat to visit the Karens tribe at Baan Nam Piang Din which is in the border of Thailand-Myanmar. For more information, contact Maehongsorn Tourists Coordination Center at 0 5361 2982-3.