| Montreal River | |
|---|---|
&sq=&lang=&file=File:Montreal_River_(Timiskaming).JPG) Montreal River at Matachewan | |
&sq=&lang=&file=File:Canada_Ontario_relief_location_map.jpg)  Location of the mouth of the Montreal River in Ontario | |
| Location | |
| Country | Canada |
| Province | Ontario |
| District | Timiskaming |
| Physical characteristics | |
| Source | Smoothwater Lake |
| • location | Timiskaming, Unorganized, West Part |
| • coordinates | 47°25′30″N 80°41′25″W / 47.42500°N 80.69028°W |
| • elevation | 378 m (1,240 ft) |
| Mouth | Lake Timiskaming |
• location | Timiskaming, Unorganized, West Part |
• coordinates | 47°08′20″N 79°27′15″W / 47.13889°N 79.45417°W |
• elevation | 178.4 m (585 ft) |
| Length | 220 km (140 mi) |
| Basin features | |
| Progression | Lake Timiskaming→ Ottawa River→ St. Lawrence River→ Gulf of St. Lawrence |
| River system | Ottawa River drainage basin |
| Tributaries | |
| • right | Lady Evelyn River, Makobe River |
The Montreal River is a river in Timiskaming District, Ontario, Canada. It travels 220 kilometres (137 mi) from its source at Smoothwater Lake to its mouth at Lake Timiskaming on the Ottawa River. The river is a significant source of hydroelectricity.