Frio River (Costa Rica)

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General data
- Name: Frio River (Costa Rica)
- Water system: San Juan River (Nicaragua)
- Water type: River
- Progression: San Juan River (Nicaragua) -> Caribbean Sea -> Atlantic Ocean -> Planet Earth
- Climates: Tropical, Subtropical
- Continents: North America, South America
- Countries: Costa Rica, Nicaragua
Description
The Frio River is a river located in Costa Rica, emerging from the northern slope on the Caribbean side of the country. It emerges from the foothills of the Tenorio Volcano and travels along the plains of the Guatusos in the north of Costa Rica. It empties into the San Juan River (Nicaragua) shortly before it joins Lake Nicaragua. In the lower part of its basin lies Caño Negro Wildlife Refuge.