This itinerary, which links the Atlantic to the Black Sea, runsalong the three longest European rivers, the Loire, the Rhine andthe Danube, from Nantes to Budapest. In Alsace, it runs along theRhone-Rhine canal through the Sundgau area, Mulhouse, Kembsand Huningue - Montreux-Vieux / Mulhouse station: 35 km- Mulhouse station / Huningue: 33 km- Total Elevation Montreux-Vieux / Huningue: 50m