Which Colombian rivers flow into the Amazon River system?

Several rivers in Colombia are part of the Amazon River system. The primary Colombian rivers that flow into the Amazon include:

• Vaupés River: Drains eastward from the Colombian Oriente into the Amazon basin.12
• Caquetá River: Known as the Japurá in Brazil, this major tributary originates in the Andes and flows into the Amazon.12
• Putumayo River: Also known as the Içá in Brazil, this river forms much of the border between Colombia and its neighbors before joining the Amazon.312
• Guainía River: Another tributary that drains eastward from the Colombian Oriente as part of the Negro River system, which is the largest tributary of the Amazon.1

These rivers are essential components of the eastern watershed in Colombia, carrying water toward the Atlantic Ocean via the Amazon drainage basin.2