3. the ping River.Top 10 longest river in the country, ThailandWater is the mount Lao border. A. Chiang DAO in Chiang Mai Province, and flows into the River, Nan, Nakhon sawan.Total distance: 715 km
3. Ping River ranked 10th longest river in the watershed in the mountains of Laos. Dao, Chiang Mai. and flow with the river. Muang. Nakhon Sawan Total distance: 715 km.
upstream at Dan Lao mountain ranges. Chiang Dao, Chiang Mai and flow, combined with the Nan river. The District of Nakhon Sawan the total distance: 715 kilometers.