| Alegre | |
|---|---|
| Native name | Rio Alegre |
| Country | Brazil |
| Basin | |
| Main source | Serra de Santa Bárbara State Park |
| River mouth | 15°01′45″S 59°58′06″W / 15.029133°S 59.968345°WCoordinates: 15°01′45″S 59°58′06″W / 15.029133°S 59.968345°W |
| River system | Guaporé River |
| Features | |
| Tributaries |
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The Alegre River (Portuguese: Rio Alegre) is a river in the state of Mato Grosso, Brazil.
The Alegre River rises in the 120,092 hectares (296,750 acres) Serra de Santa Bárbara State Park, created in 1997. It flows in a generally northwest direction, receiving the Barbado River on its left, then flows north until it joins the Guaporé River from the left.