What river runs through the Rhone valley?
Rhône
At Martigny, where it receives the waters of the Drance on its left bank, the Rhône makes a strong turn towards the north. Heading toward Lake Geneva, the valley narrows, a feature that has long given the Rhône valley strategic importance for the control of the Alpine passes. The Rhône then marks the boundary between the cantons of Valais (left bank) and Vaud (right bank), separating the Valais Chablais and Chablais Vaudois. It enters Lake Geneva near Le Bouveret.
Saint-Vallier, Drôme
The town is situated on the bank of the River Rhone, north of Valence. The River Galaure flows northwest through the southern part of the commune, crosses the town, then flows into the Rhone, which forms the commune's western border.