List of tributaries of the Danube
The Danube is Europe's second-longest river. It starts in the Black Forest in Germany as two smaller rivers—the Brigach and the Breg—which join at Donaueschingen, and it is from here that it is known as the Danube, flowing generally eastwards for a distance of some , passing through several Central and Eastern European capitals, before emptying into the Black Sea via the Danube Delta in Romania.
EV6 The Rivers Route
The EV6 traverses 10 countries from Saint-Nazaire in France at the mouth of the River Loire, eastward along the Loire to the River Saône, across the border to Switzerland, along the Rhine to Lake Constance, north into Germany, down the River Danube and through Austria, Slovakia, Hungary, Serbia, Croatia, Bulgaria, and Romania to the Danube Delta, before terminating at Constanța on the Black Sea.