Moselle, Ger. Mosel, river, 320 mi (515 km) long, rising in the Vosges Mts., NE France, and winding generally N past Épinal and Metz. Leaving France, it forms part of the border between Luxembourg and Germany, then enters Germany, passes Trier, and cuts between the Eifel and the Hunsrück ranges to reach the Rhine River at Koblenz. The Moselle receives the Saar River near Trier. The German section of the Moselle valley is dotted with numerous old castles and is covered with celebrated vineyards. The Moselle Canal, built in 1964, made the river navigable for 1500 ton barges between Metz and Koblenz. The canal is overseen by representatives of France, Luxembourg, and Germany, and is a symbol of peace among them.