River
Kok River
285 km from source to mouth · Laos, Myanmar and Thailand.
Laos, Myanmar and ThailandFlows into Mekong River3rd longest in Laos
In numbers
Length
285km
Average flow
2,800m³/s
Basin
10,875km²
Drop
603m
from 959 m to 356 m
Countries
3
The journey
From source to mouth
285 km of river and 2 stops on the way: 1 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmSourceat 959 m
- 223 kmChiang Rai78,756 people
- 239 kmLao River, Thailandtributary
- 285 kmMekong Riverat 356 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in Thailand
At the mouth it carries 2,816 m³/s on average: 1.1 Olympic pools every second. It drops from 959 m to 356 m, 2.1 m per kilometre on average. Its basin covers 10,875 km², about the size of XK. 8.3 million people live in it. Highest water: from August to September; lowest: from January to April. No large dam holds it back: it is one of the world's free-flowing rivers.
Where to start
- Chiang RaiLargest city on its banks · 78,756 people
- Mae Fah Luang - Chiang Rai International Airport (CEI)Nearest airport with scheduled flights, 7 km from the cityCar hire in Chiang RaiDiscover Cars · Affiliate link↗
- On the water3 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- From November to MarchThe best months to visit
Kok River, month by month
Highest water: from August to September
Lowest water: from January to April. Best months to visit: from November to March.
From about 530 m³/s in the lowest month to 7,400 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.
Plan the trip
Plan the trip: boat trips, a bed by the river, a car
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
The basin
Kok River: the basin in numbers
202,461 km² of land send their water to this river. This is what lives on it.
- 8.3millionpeople live in the basin
- 41/km²people per km²
- 2,656maverage altitude of the basin
- 1,028mmof rain a year (basin average)
- 11.2°Caverage air temperature
- 26%protected areas
- 0.2%covered by lakes
- 11%permafrost
- 1.1km³held in reservoirs
What covers the basin
- 20% Forest
- 8% Cropland
- 36% Pasture
- 1% Towns and cities
RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.
Along the river
Kok River: what you find on the way
- 7Weirs
- 3Locks
- 1WaterfallsHuay Keaw Waterfall
- 1Boat ramps
- 2Ferry piersBoat Landing Thaton
- 1River beachesTerritorial Defense Field Beach
From OpenStreetMap, within 2.6 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Kok River in our other atlases
What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.
7mountains at the sourcePeakyas
Mountains at the source (7)
Within 15 km of the source, by Peakyas
- Loi Katwo3.3 km away1,914m
- Loi Namhet11 km away1,643m
- Loi Hu7.9 km away1,467m
- Loi Namlintawng12 km away1,204m
- Loi Pē-na-hpek13 km away
- Loi Hsamhsao2.6 km away
- Loi Pè-kō-la13 km away
From space
The source and the mouth, seen from orbit
Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.
Photos
Kok River in pictures
Tributaries
Where it flows, and what flows into it
It flows into
Mekong River
Vietnam4,350 km15,000 m³/sTributaries (1)
Also: Lao River, Thailand
CambodiaWhere these numbers come from
| Name, length, places | Wikidata (Q1266640) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Our other atlases | Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST |
Every source and licence is on the data sources page.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.
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Every summit in 3D: summit weather, the 0 °C line, huts and trails.Visit 
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islands
Every island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit 
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Every river from source to sea: the journey, the flow and the basin in numbers.You are here
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Every canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit