Which river is the longest in South America?
Quick Answer
The Amazon River is the longest river in South America, at about 6,400 kilometres when measured by many commonly used routes. It is also the continent’s largest river by discharge.
The Full Story
The Amazon River is generally recognized as South America’s longest river, with commonly cited lengths around 6,400 kilometres, though measurements vary depending on source and method. It runs from the Andes across the continent to the Atlantic Ocean. The river is also by far the largest in the world by water discharge. Its basin is a global biodiversity hotspot and supports many indigenous communities and major cities. The Amazon is the defining river of South America.
Key Facts
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"South America’s giant river is also Earth’s biggest river system"