The Rio Cupixi is a river located in the state of Amapá in northeastern Brazil. It is situated within the broader Amazon biome, flowing through the region near the settlement of Cupixi. A specific paddling route documented as an airboat trail connects the Rio Cupixi to the Rio Amapari and the Igarapé Cupizxizinho. This route is an out-and-back trail with a total distance of approximately 36 miles (about 58 kilometers). The trail's GPS track is available for download, indicating it is a navigable waterway suitable for small craft, though the documented use is specifically for airboats. The river's course through the Amapá landscape suggests a remote, lowland tropical environment characteristic of the area, with likely dense riparian vegetation. No specific access points, hazards, seasonal patterns, water temperatures, regulations, or facilities for paddlers are detailed. The connection to the larger Rio Amapari system implies the potential for extended exploration into a network of waterways in this part of the Brazilian Amazon.