Semois river

General data
- Water type: River
- Progression: Meuse (Maas) -> Bergse Maas -> Amer (Meuse distributary) -> Hollands Diep -> Haringvliet estuary -> North Sea -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: Europe
- Countries: Belgium, France
Description
The Semois (known as the Semoy in France) is a river flowing from the Ardennes uplands of Belgium and France towards the Meuse, of which it is a right tributary. The source of the Semois is in Arlon, Wallonia, in the Belgian province of Luxembourg, close to the border with the Grand Duchy of Luxembourg. Flowing in a roughly westerly direction, it enters France after passing through the Belgian village of Bohan-sur-Semois and forms about 2 kilometres (1.2 mi) of the Belgian–French border. It joins the Meuse 24 kilometres (15 mi) further downstream in Monthermé. The total length of the river is 210 kilometres (130 mi).