Largest tributaries
The Isère is a river in the Auvergne-Rhône-Alpes region of southeastern France. Its source, a glacier known as the Sources de l\’Isère, lies in the Vanoise National Park in the Graian Alps of Savoie, near the ski resort in Val-d\’Isère on the border with Italy.
An important left-bank tributary of the Rhône, the Isère merges with it a few kilometers north of Valence.
Many riverside communes have incorporated the Isère\’s name into their own, for example, Sainte-Hélène-sur-Isère and Romans-sur-Isère. The department of Isère is likewise named after the river.
