| Rio das Mortes | |
|---|---|
| Location | |
| Country | Brazil |
| Physical characteristics | |
| Source | |
| • location | Mato Grosso state |
| Mouth | |
• coordinates | 11°44′S 50°43′W / 11.733°S 50.717°W |
| Length | 580 km (360 mi) |
The Rio das Mortes ("River of the Dead") is a river of Mato Grosso state in western Brazil. It has a length of 580 km.