With its approximately length of 180 kms, 30 m. width and 7 m. depth, the Pai River is the biggest and longest river in Mae Hong Son. This challenges the adventurous lover to raft along this river and three most suitable points are recommended. They are :

1. Source of the River to Amphoe Pai : Starting from Huai Chang Kaeo, 16 kms. from Amphoe Pai to Wiang Nua Bridge or Ban Chomphon near Amphoe Pai, taking about 6 hours. Most suitable time to raft is between October - March.

2. From Amphoe Pai to Amphoe Muang : Starting from Ban Mo Paeng, Amphoe Pai to Ban Pang Mu in Amphoe Muang. The distance of this route is about 70 Kms. and takes at least 2 day of rafting.

3. From Amphoe Muang to the border of Thailand and Myanmar : Starting from Ban Huai Dua, Tambon Pha Bong, about 6 kms. from Amphoe Muang to the border at Ban Nam Phiang Din. Normally this section of Pai River is more enjoyable to cruise along by the long-tailed moto boat which only takes 2-3 hours returned trip or riding on elephant back instead of rafting since the nature and scenery on both sides is fascinating and beautiful. Tour operators and major hotels in Mae Hong Son town provide necessary services including boat cruise, rafting and trekking.