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River

Our

96 km from source to mouth · Luxembourg, Germany and Belgium.

LuxembourgGermanyBelgiumLuxembourg, Germany and BelgiumFlows into Sauer1st longest in Luxembourg

Follow the riverMonth by month

SourceMouth
The river and every tributary in its basin, drawn from RiverATLAS (CC BY 4.0).

In numbers

Length

96km

Average flow

9.4m³/s

Basin

187km²

Drop

229m

from 408 m to 179 m

Countries

3

The journey

From source to mouth

96 km of river and 14 stops on the way: 5 towns and cities on its banks, dams, bridges and the tributaries that feed it.

408 m179 m
High Fensat 408 m0 km
Atzerath107 people9 km
Ulftributary26 km
Reuland1,592 people28 km
Tëntesmillen - Dahnen Our Bridge45 km
Wanderbrücke Dornauelsmühle56 km
Gemünd Our Bridge66 km
Stolzembourg - Keppeshausen Our Bridge70 km
Schloss Roth81 km
Sauerat 179 m96 km
02040608096 km
  1. 0 kmHigh Fensat 408 m
  2. 9 kmAtzerath107 people
  3. 20 kmLommersweiler1,215 people
  4. 26 kmUlftributary
  5. 28 kmReuland1,592 people
  6. 30 kmStubach Bridge
  7. 45 kmTëntesmillen - Dahnen Our Bridge
  8. 56 kmWanderbrücke Dornauelsmühle
  9. 66 kmGemünd Our Bridge
  10. 70 kmStolzembourg - Keppeshausen Our Bridge
  11. 71 kmPasserelle de Bivels
  12. 79 kmVianden2,203 people
  13. 81 kmSchloss Roth
  14. 83 kmKörperich1,089 people
  15. 92 kmIrsentributary
  16. 96 kmSauerat 179 m

Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.

River in Belgium, Germany and Luxembourg

At the mouth it carries 9.4 m³/s on average: an Olympic pool every 267 seconds. It drops from 408 m to 179 m, 2.4 m per kilometre on average. Its basin covers 187 km². 454,000 people live in it. Highest water: from December to January. Its dams hold back little of its water (5.0% of a year's flow).

Read more on Wikipedia

Where to start

  • ViandenLargest city on its banks · 2,203 people
  • Luxembourg-Findel International Airport (LUX)Nearest airport with scheduled flights, 34 km from the cityCar hire at LUX airport (Luxembourg)Discover Cars · Affiliate link
  • On the water3 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
  • From June to SeptemberThe best months to visit

Our, month by month

Highest water: from December to January

Best months to visit: from June to September.

63
1°63 mmJan
42
2°53 mmFeb
33
5°59 mmMar
13
8°48 mmApr
15
12°67 mmMay
13
16°67 mmJun
16
17°74 mmJul
18
17°71 mmAug
16
14°60 mmSep
26
9°63 mmOct
56
4°76 mmNov
71
2°73 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 13 m³/s in the lowest month to 71 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

Our: the basin in numbers

3,011 km² of land send their water to this river. This is what lives on it.

Lightly regulatedReservoirs can hold 5.0% of a year's flow.
  • 454,000people live in the basin
  • 150/km²people per km²
  • 404maverage altitude of the basin
  • 917mmof rain a year (basin average)
  • 8.3°Caverage air temperature
  • 46%protected areas
  • 0.1%covered by lakes
  • 0.1km³held in reservoirs

What covers the basin

  • 36% Forest
  • 20% Cropland
  • 26% Pasture
  • 9% 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

Our: what you find on the way

  • 8DamsVianden Dam and 7 more
  • 12Weirs
  • 1Waterfalls
  • 3Boat ramps

From OpenStreetMap, within 1.5 km of the river. Not mapped is not the same as not there.

Cross-checked with our atlases

Our 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.

  • 78mountains at the sourcePeakyas

Mountains at the source (78)

Within 15 km of the source, by Peakyas

  1. Weißer Stein3.8 km away693m
  2. Schwarzer Mann14 km away698m
  3. Eichels-Berg0.5 km away653m
  4. Hohe Mark14 km away609m
  5. Giesberg11 km away607m
  6. Schartenknopf7.0 km away572m
  7. Dickelt12 km away569m
  8. Dickert12 km away562m

70 more on PeakyasOpen Peakyas ↗

From space

The source and the mouth, seen from orbit

Our: satellite view of the source
The source14 km across
Our: satellite view of the mouth
The mouth10 km across

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.

Where these numbers come from

Name, length, placesWikidata (Q318762) · CC0
Course, profile, basinRiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata
FlowWaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0
Climate along the riverWorldClim (RiverATLAS), 1970–2000 · CC BY 4.0
Towns, bridges, damsWikidata · CC0; GeoNames · CC BY 4.0
Along the river© OpenStreetMap contributors · ODbL
ImagesEOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons
Our other atlasesPeakyas — 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.

beachesCoastyaFind your beach: sea temperature, sun and swimming month by month.Visit
lakesLakeyasEvery lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit
mountainsPeakyasEvery summit in 3D: summit weather, the 0 °C line, huts and trails.Visit
waterfallsCascadyasEvery waterfall: height, flow month by month and when it roars.Coming soonVisit
islandsIslandyasEvery island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit
riversRiveryasEvery river from source to sea: the journey, the flow and the basin in numbers.You are here
canyonsCanyonyasEvery canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit