Our (; , ) is a river in Belgium, Luxembourg and Germany. It is a left-hand tributary of the Sauer/Sûre. Its length is , and it drains a basin of .
The source lies in the High Fens in southeastern Belgium, near Manderfeld. The river flows southwards along the GermanâÂÂBelgian border, then from Ouren onward along the GermanâÂÂLuxembourg border. The historic town of Vianden lies on the Our. It empties into the Sauer near Wallendorf.
The river rises in the eastern Ardennes and western Eifel on Belgian soil. Its source near Losheimergraben lies northeast of the Eichelsberg mountain (653 m) at 643 m, near the B 265. Just a few hundred metres away is the source of the River Kyll. The Our initially follows the B 265, also the BelgianâÂÂGerman border. From the tripoint by the Europa Monument between Ouren (Belgium), Sevenig (Germany), and Lieler (Luxembourg), it runs almost entirely on the GermanâÂÂLuxembourg border until Wallendorf. It generally meanders from north to south.
For the section along the GermanâÂÂLuxembourg border, the Our is a jointly managed condominium (the "Joint GermanâÂÂLuxembourg Sovereign Area"). Unilateral sovereignty begins only at the respective shore. In the upper reaches between Germany and Belgium, the border lies on the thalweg.
<small>â Location of confluences measured from source âÂÂ</small>
A comprehensive list including smaller tributaries is at .
The town of Vianden, one of the main tourist destinations in Luxembourg, lies on the Our. The Our Valley Route is a circular touring route through Belgium and northern Luxembourg.
Other villages include:
The Our is impounded north of Vianden by the Our Dam, forming the lower basin of the Vianden Pumped Storage Plant.