The Ribeirão Cristalino, often referred to as the Cristalino River, is a waterway located in the state of Mato Grosso, Brazil, near Alta Floresta. The river flows through dense Amazonian forest and is a central feature of the Cristalino State Park area. Its character is defined by clear water, a winding course, and a natural, undeveloped setting. For paddlers, the river is navigable by canoe, offering a quiet and relaxing experience where gliding silently along is a highlight. The scenic views from the water are consistently described as wonderful, with the surrounding jungle providing a rich backdrop. However, the river presents specific challenges for navigation due to a large number of submerged rocks and the presence of small rapids along its course. Access to trails and the river itself typically requires some form of water transport, as there are no direct road access points. The area is renowned for its biodiversity, particularly for birdwatching, with certain species being observed frequently in the region. A notable point of reference for visitors is the Cristalino Lodge, a private operation located along the river that offers canoeing as an activity for its guests. The long-term status of the surrounding protected area, Cristalino State Park, has been subject to political challenges, but this does not currently affect the physical act of paddling on the river itself. There is no indication that paddling is restricted or prohibited.