The Our (German, Luxembourgish and French Our) is a 96.1 km long tributary of the Sauer along the border between Germany (D) and its western neighbours Belgium (B) and Luxembourg (L). It flows mainly from north to south and meanders in sections.
The Our rises in the eastern Ardennes and the western Eifel on Belgian territory. Its source is in the municipality of Büllingen near the district of Losheimergraben.
The Our initially flows a little southwest of the B 265, which runs close to the river directly along the German-Belgian border. It passes two districts of Büllingen, Hüllscheid and Berterath. Shortly afterwards it flows into Germany for a while near Verschneid, a hamlet in Auwer in Rhineland-Palatinate. Shortly afterwards the Our flows back into Belgium near Schönberg, Atzerath and Alfersteg. From about Weppeler to Auel it runs along the Belgian-German border and then back into Belgium near Weweler. Then the Our flows again along the state border between Stoubach (B) and Stupach (D) and past Welchenhausen (D) and Oberhausen (B). It then flows through Belgium for the last time near Peterskirchen-Ouren.
From around the European Monument at the border triangle of Belgium, Germany and Luxembourg between Ouren (B), Sevenig (D) and Lieler (L), the Our flows almost entirely along the German-Luxembourg border.
It flows into the Sauer, a tributary of the Moselle, coming from the west near Wallendorf (D). (Source: Wikipedia)