The Drôme is a river located in the Southern Alps. The river gave its name to the department of Drôme in the Auvergne-Rhône-Alpes region (France).

It flows into the Rhône near Loriol-sur-Drôme, between Valence and Montélimar. Tributaries of the Drôme include the Bez (or Bès), the Roanne and the Gervanne.

110.64 km long, the Drôme has its source in the Diois, at the Col de Carabès in the commune of La Bâtie-des-Fonds at an altitude of 1,262 m, to the south of the Vercors massif (Alps). During its crossing of the Haut-Diois mountains, in a deep valley, it experiences a torrential regime. Near Luc-en-Diois, at the site known as Claps, the Drôme makes a stop, it is one of the local curiosities.

In 1891, the Drôme had a course of 101 km, an average width of 70 m.

The Drôme is a pre-Alpine type watercourse which already has marked Mediterranean features (calm in summer, violent in autumn and spring); the irregularity of its regime is strongly linked to snowmelt and autumn rainfall.

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