The Grésivaudan (sometimes Graisivaudan) is a valley of the French Alps, situated mostly in the Isère. Etymologically, Graisivaudan comes from roots meaning "Grenoble" (Gratianopolis) and "valley". It comprises the alluvial plain of the Isère River from Grenoble to the confluence of the Arc; or, more recently, the entire valley of the Isère from Tullins to Albertville.