The
Ucayali River (, ) arises about north of
Lake Titicaca, in the
Arequipa region of
Peru. The
Amazon River takes its name close to
Nauta city (100 km upstream/south of
Iquitos), at the confluence of the
Marañón and Ucayali rivers. The Ucayali becomes a major tributary of the Amazon River. Navigation was blocked by lengthy sections of rapids. The city of
Pucallpa is located on the banks of the Ucayali.