The Rio Preto da Eva is a river in the state of Amazonas, Brazil, located approximately 120 kilometers from the city of Manaus. It flows through the heart of the Amazon rainforest, and the surrounding municipality of the same name is a common base for jungle adventures. The river provides access to a luxuriant rainforest environment, and it is a focal point for guided tours and expeditions originating from Manaus. These tours often utilize motorized canoes for initial transport before transitioning to activities like kayaking, camping, and wildlife spotting in the jungle. One specific kayaking and canoeing trail on the river is documented as being 3.97 miles in length with a very modest elevation gain and loss of 23 feet, suggesting a relatively flat and meandering course through the lowland forest. The trail is rated as having moderate difficulty. The area is serviced by jungle lodges, such as the Maloca Jungle Lodge, which offer simple accommodation and serve as starting points for river excursions. Expeditions on connected waterways, like the Urubu River, can involve kayak journeys of significant distance, ranging from 106 to 120 miles, indicating the potential for extended trips in this region of the Amazon basin.