| Mont Ruan | |
| Elevation M: | 3057 |
| Prominence M: | 227 |
| Prominence Ref: | [1] |
| Map: | Switzerland |
| Parent Peak: | Tour Sallière |
| Location: | Valais, Switzerland (mountain partially in France) |
| Range: | Chablais Alps |
| Coordinates: | 46.1242°N 6.9028°W |
Mont Ruan (or Grand Mont Ruan) is a mountain in the Chablais Alps, overlooking the lake of Emosson in the Swiss canton of Valais. At 3057m (10,030feet) above sea level, its main summit is located 200m (700feet) away from the French border, where lies a slightly lower summit at 3044m (9,987feet).
Mont Ruan is the westernmost mountain rising above 3000m (10,000feet). in Switzerland.