The Rio Aguapeí, also popularly known as the Rio Feio, is a river in the state of São Paulo, Brazil. It originates near the town of Gália, close to the SP-294 highway, and flows for approximately 22 kilometers before joining the Paraná River as a left tributary. The river's principal tributary is the Rio Tibiriçá. A notable landmark along its course is the Pontilhão do Rio Feio in the municipality of Pirajuí. For paddlers, resources like PaddleWays provide planning tools that can show access points, water conditions, and land boundaries, which are essential for trip preparation. The river's character is defined by its role as a tributary within the broader Paraná River system, flowing through the interior regions of São Paulo state. Specific details regarding seasonal water temperature patterns, water quality, facilities for paddlers, or any restrictions on paddling are not detailed. The aesthetic and environmental conditions, including wildlife and water cleanliness, are not explicitly described, requiring paddlers to seek local guidance. The river's relatively short length of 22 kilometers suggests potential for day trips, but recommended routes and seasonal timing for optimal paddling are not specified.