Ecuador–Peru border, International border between Ecuador and Peru, South America
This international boundary runs over 1500 kilometers from the Pacific coast through the Andes mountains into the Amazon rainforest. The line follows rivers such as the Río Zarumilla in the west and the Napo in the east, crosses mountain ridges, and cuts through dense forest.
Spanish colonial administrations drew the line vaguely in the 16th century, leading to armed conflicts after independence. A peace treaty in 1998 ended the disputes and established the definitive course.
The frontier runs through areas where communities speak Kichwa and Shuar, maintaining their connection to the forest through medicinal plants and traditional foods. On both sides, people still use canoes and footpaths that predate any official line on a map.
Travelers need to present valid passports at official crossings such as Huaquillas-Aguas Verdes on the coast or La Balsa in the highlands. Remote forest sections have no roads or checkpoints, so most visitors use the western points.
In the eastern section, the line runs through areas where researchers regularly discover species previously unknown to science. Some of these forests are so difficult to reach that biologists often need several days by river to get there.
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