River
Yom River
600 km from source to mouth · Thailand.
ThailandFlows into Nan River4th longest in Thailand
In numbers
Length
600km
Average flow
430m³/s
Basin
55,000km²
Drop
340m
from 367 m to 27 m
Country
1
The journey
From source to mouth
600 km of river and 11 stops on the way: 8 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmSourceat 367 m
- 41 kmPong14,392 people
- 117 kmKaeng Suea Ten Dam
- 124 kmNgao Rivertributary
- 178 kmPhrae38,538 people
- 202 kmDen Chai17,019 people
- 231 kmLong11,802 people
- 316 kmAng Kep Nam Huai Mae Sung1.4 km²
- 326 kmSi Satchanalai25,942 people
- 352 kmSawankhalok19,805 people
- 393 kmSukhothai37,000 people
- 448 kmBang Rakam16,841 people
- 600 kmNan Riverat 27 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 430 m³/s on average: an Olympic pool every 5.8 seconds. It drops from 367 m to 27 m, 0.6 m per kilometre on average. Its basin covers 55,000 km², about the size of HR. 1.9 million people live in it. Highest water: 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
- PhraeLargest city on its banks · 38,538 people
- Lampang Airport (LPT)Nearest airport with scheduled flights, 69 km from the cityCar hire at CNX airport (Chiang Mai)Discover Cars · Affiliate link↗
- Kayak and canoe1 put-ins and rapids mapped (OpenStreetMap)
- From November to FebruaryThe best months to visit
Yom River, month by month
Highest water: September
Lowest water: from January to April. Best months to visit: from November to February.
From about 33 m³/s in the lowest month to 210 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
Yom River: the basin in numbers
24,675 km² of land send their water to this river. This is what lives on it.
- 1.9millionpeople live in the basin
- 77/km²people per km²
- 266maverage altitude of the basin
- 1,190mmof rain a year (basin average)
- 26.3°Caverage air temperature
- 13%protected areas
- 0.1%covered by lakes
What covers the basin
- 33% Forest
- 29% Cropland
- 3% 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
Yom River: what you find on the way
- 17WeirsMae Song and 16 more
- 2WaterfallsPhathan Waterfall
- 1RapidsKaeng Suea Ten Rapids
From OpenStreetMap, within 2.0 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Yom 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.
1lake on its wayLakeyas
25mountains at the sourcePeakyas
Lakes and reservoirs (1)
Lakes it flows through, by Lakeyas
- Ang Kep Nam Huai Mae Sungkm 3221.4km²
Lakeyas is coming soonOpen Lakeyas ↗
Mountains at the source (25)
Within 15 km of the source, by Peakyas
- Doi Phu Langka3.7 km away
- Doi San Pan Nam12 km away
- Doi Nang8.9 km away
- Doi Phu Kian13 km away
- Doi Khun Huai Hom12 km away
- Doi Huai Hom11 km away
- Doi Khun Nam Khan8.9 km away
- Doi Pha Daeng10 km away
17 more on PeakyasOpen Peakyas ↗
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.
Tributaries
Where it flows, and what flows into it
Tributaries (6)
Also: Ngao River, Nam Ngim, Nam Khuan, Mae Mok, Khlong Mae Ramphan, Nam Mae Kham Mi
Nearby
Rivers nearby
Thailand800 km260 m³/s25 km awayPa Sak RiverThailand513 km220 m³/s171 km awayChao Phraya RiverThailand372 km840 m³/s253 km awaySalween River
Myanmar2,815 km4,900 m³/s288 km awayMae KlongThailand140 km590 m³/s279 km awaySittaung RiverMyanmar560 km1,200 m³/s390 km awayNam Ngum
Laos354 km670 m³/s393 km awayChi RiverThailand765 km290 m³/s483 km awayWhere these numbers come from
| Name, length, places | Wikidata (Q586733) · 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 | Lakeyas, 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?
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