Loei River

The Loei River ( th, แม่น้ำเลย, , ) is the one of tributaries of the

Mekong River The Mekong or Mekong River is a trans-boundary river in East Asia and Southeast Asia. It is the world's twelfth longest river and the third longest in Asia. Its estimated length is , and it drains an area of , discharging of water annual ...

. It originates at the western shore of the Phu Luang plateau, at first flowing southwards. Changing to an eastward direction it becomes the boundary between Loei and

Phetchabun Province Phetchabun ( th, เพชรบูรณ์, ) is one of Thailand's seventy-six provinces (''changwat'') lies in lower northern Thailand. Neighbouring provinces are (from north clockwise) Loei, Khon Kaen, Chaiyaphum, Lopburi, Nakhon Sawan, P ...

, encircles the Phu Ho mountain and then flows northwards across the town

Loei Loei (; ) is a town (''thesaban mueang'') in northeast Thailand. Loei covers the whole ''tambon'' of Mueang Loei district and is the capital of Loei province. In 2017, Loei had a population of 21,013. Loei lies 545 km north-northeast of B ...

until it and mouths to the Mekong River in Na Sao Subdistrict, Chiang Khan District. Rivers of Thailand Tributaries of the Mekong River {{Thailand-river-stub