Putumayo River

The Putumayo River (, ) is one of the tributaries of the Amazon River, west of and parallel to the Japurá River. It forms part of Colombia's border with Ecuador, as well as most of the frontier with Peru. Known as the Putumayo in the former three nations, it is called the Içá when it crosses into Brazil. The Putumayo originates from an elevation of in the Andes Mountains east of the municipality of Pasto, Colombia. It empties into the Amazon River near the municipality of Santo Antônio do Içá, Brazil. Major tributaries include the Guamués River, San Miguel, Güeppí, Cumpuya, Algodón, Igara-Paraná, Yaguas, Cotuhé, and Paraná de Jacurapá rivers.