The Rhône River: From Swiss Alps to Mediterranean

The Rhône (812 km / 505 mi) is one of Europe's great rivers, linking the Alps to the Mediterranean.

Course

1. Source: Rhône Glacier, Valais, Swiss Alps (2,209 m).
2. Lake Geneva (Lac Léman): Traverses 72 km; regulates flow, traps sediment.
3. Geneva to Lyon: Narrows, gains tributaries (Arve, Saône).
4. Lyon: Confluence with Saône (major tributary); historic silk, gastronomy capital.
5. Lower Rhône: South through Valence, Avignon, Arles; delta (Camargue) splits into Grand Rhône and Petit Rhône.
6. Mediterranean: Empties into Gulf of Lion near Port-Saint-Louis-du-Rhône.

Significance

• Navigation: Canalized (Lyon–Mediterranean); 300 km navigable for 3,000-tonne barges.
• Hydropower: 19 dams (Génissiat, Donzère-Mondragon); 13 TWh/yr.
• Cooling: Nuclear plants (Bugey, Tricastin, Cruas, Saint-Alban).
• Ecology: Camargue delta—flamingos, wild horses, rice paddies, salt pans; Ramsar/UNESCO.
• History: Greek (Massalia), Roman (Lugdunum), medieval trade, Papal Avignon.

The Rhône is France's most powerful river by discharge (1,700 m³/s avg)—a lifeline for energy, agriculture, and Mediterranean exchange.