| Doux | |
|---|---|
 Gorges du Doux | |
 | |
| Location | |
| Country | France |
| Physical characteristics | |
| Source | |
| • location | Massif Central |
| Mouth | Rhône |
• location | Tournon-sur-Rhône |
• coordinates | 45°04′22″N 4°49′45″E / 45.0729°N 4.8292°E / 45.0729; 4.8292 |
| Length | 70 km (43 mi) |
| Basin features | |
| Progression | Rhône→ Mediterranean Sea |
The Doux (French pronunciation: [du] ⓘ; Occitan: Dòç) is a tributary of the Rhône in the Haute-Loire and Ardèche departments, France. It is 70 km (43 mi) long.1 It begins in the Massif Central and joins the Rhône in Tournon-sur-Rhône. It passes through the town Lamastre. The Chemin de fer du Vivarais heritage railway from Tournon-sur-Rhône to Lamastre runs through the Doux valley.