L'Oisans is a region in the French Alps, located in the départements of l'Isère and Hautes-Alpes, and corresponding to the drainage basin of the River Romanche and its tributaries (Eau d'Olle, Lignarre, Sarenne, Vénéon and Ferrand). Between Livet-et-Gavet and Le Bourg-d'Oisans, the Romanche forms a deep gorge.