Mouth of the River Kok

The Kok River originates in the Daen Lao Range, Shan State, Myanmar. It flows eastwards across the Myanmar–Thailand border, crossing at the Thai border town of Tha Ton. It flows to Mae Ai District, Chiang Mai Province. Most of its length in Thailand is in Chiang Rai Province where it passes Mueang Chiang Rai District after which it bends northeastwards and flows through Mae Chan, Wiang Chai and Chiang Saen districts. It is a wide, shallow, and slow-moving river. There is about 600 metres of small-scale whitewater halfway between the towns of Tha Ton and Chiang Rai. For several kilometres downriver from Chiang Rai, the river becomes a lake, until it reaches the irrigation dam near Wiang Chai. The Kok River is a tributary of the Mekong River, with its mouth at Sop Kok in Chiang Saen District, opposite the Lao border. The main tributaries of the Kok River are the Fang and the Lao River, the latter having its source in the Phi Pan Nam Range. [Source: Wikipedia]

Ayutthaya Historical Research