|Kok River (น้ำแม่กก)|
The Kok River in Amphoe Mae Ai, Chiang Mai Province
|States||Shan State, Chiang Mai Province, Chiang Rai Province|
|Districts||Mae Ai, Mueang Chiang Rai, Mae Chan, Wiang Chai, Chiang Saen|
|- right||Fang, Lao River|
|City||Chiang Rai city|
|- location||Daen Lao Range, Shan State, Burma|
|- location||Sop Kok, Wiang Chai, Chiang Rai Province|
|- elevation||358 m (1,175 ft)|
|Length||285 km (177 mi)|
|Basin||10,875 km2 (4,199 sq mi)|
|Discharge||for Chiang Rai city|
|- average||120 m3/s (4,238 cu ft/s)|
|- max||848 m3/s (29,947 cu ft/s)|
|- min||5 m3/s (177 cu ft/s)|
Map of the Thai highlands
The river originates in the Daen Lao Range, Shan State, Burma. It flows eastwards across the Myanmar-Thailand border, coming in at the Thai border town of Tha Ton (Thai: ท่าตอน, also spelled Thaton ). 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 (2,000 ft) of small-scale whitewater halfway between the towns of Taton and Chiang Rai. Alongside the Mae Kok river, an hour's boat ride upstream from Chiang Rai town, is a touristy "elephant camp" on its north shore.
For several kilometres downriver from Chiang Rai, the river becomes a lake, until it reaches the irrigation dam near Wiang Chai.
Phahonyothin Road crosses this river near Chiang Rai City. Altogether, there are five bridges crossing the Mae Kok river near Chiang Rai city.
Boating and rafting
Small long-tail boats ply the Mae Kok between the towns of Taton and Chiang Rai.
There is a small dam with 11 gates which provides irrigation for rice fields east of Chiang Rai. The dam is 11 kilometres (7 mi) east of the Hwy 1 bridge. It turns the river into a lake, several miles long, for eight months of the year. Additionally, there is a dam planned on the Burmese side of where the river flows into Thailand, about 32 kilometres (20 mi) upstream from the border.
In October 2013  the cast and crew of the British television show Top Gear constructed a bridge over the river Kok as part of their Burma Special. The bridge was originally planned to be built over the River Kwai, but the River Fang which flows into the River Kok was chosen "accidentally". The show aired in two parts on 9 March 2014 and 16 March 2014.
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