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Sauer facts for kids

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Sure River Weilerbach.jpg
The Sauer at Weilerbach, forming the border between Luxembourg and Germany.
Countries  Belgium,  Luxembourg,  Germany
Region Ardennes
 - left Wiltz, Our, Prüm
 - right Alzette, White Ernz, Black Ernz
Cities Ettelbruck, Diekirch, Echternach
 - location Vaux-sur-Sûre, Belgium
 - elevation 510 m (1,673 ft)
 - coordinates 49°54′39″N 5°33′59″E / 49.91083°N 5.56639°E / 49.91083; 5.56639
 - location Moselle, Luxembourg & Germany
 - elevation 132 m (433 ft)
 - coordinates 49°42′48″N 6°30′24″E / 49.71333°N 6.50667°E / 49.71333; 6.50667
Length 173 km (107 mi)
Basin 4,240 km² (1,637 sq mi)
Discharge for Bollendorf
 - average 40.5 /s (1,430 cu ft/s)

The Sauer (German, Luxembourgish) or Sûre (French) is a river in Belgium, Luxembourg and Germany. It is a left tributary of the river Moselle, and so it is part of the drainage basin of the Rhine river.


The Sauer river has a length of 173 km (107.5 mi) and a drainage basin with an area of 4,240 km2 (1,637 sq mi).


Sauer - Vaux-sur-Sure
The Sauer near its source in Vaux-sur-Sûre

The source of the Sauer is, as Sûre, in the southeast of Belgium in the Ardennes (Luxembourg province), on the western part of the Rhenish Massif, at an altitude of about 510 m (1,673 ft).

From there, the Sauer flows to the east and crosses the border between Belgium and Luxembourg near Martelange. It forms the border between Belgium and Luxembourg for 13 km (8 mi) north of Martelange. On their way through the mountainous north of Luxembourg (the Oesling), it passes through the Lac de la Haute Sure, an artificial lake to the west of Esch-sur-Sûre.

After flowing through Ettelbruck and Diekirch, the Sauer forms the border between Luxembourg and Germany for the last 50 km (31 mi) of its course, passing Echternach before joining, as left tributary, the Moselle in Wasserbillig, at about 132 m (433 ft) of altitude.

Main tributaries

  • Left tributary
    • Wiltz - 42 km
    • Blees - 14 km
    • Our - 78 km
    • Gaybach - 23.2 km
    • Prüm - 95 km
  • Right tributary
    • Alzette - 73 km;
    • White Ernz - 30 km;
    • Black Ernz - 25 km;


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Sauer Facts for Kids. Kiddle Encyclopedia.