The Rio São João is a stream located in the state of Mato Grosso in western Brazil. It is a tributary of the larger Juruena River, which situates it within the expansive river systems of the Brazilian interior. The water body is known within the fishing community, particularly for species like Butterfly peacock bass and Redtail catfish, indicating a healthy aquatic ecosystem. For paddlers, this suggests a waterway where wildlife sightings, particularly of fish and associated birdlife, could be a notable feature of the journey. Boat ramps are available, though their exact locations are not detailed. The overall character of the paddling experience is likely influenced by its status as a stream, implying a more intimate and potentially winding course compared to a major river, though its specific size and flow characteristics are not quantified. The region's tropical climate suggests that water temperatures will be warm for most of the year, with a distinct wet and dry season influencing water levels and current speed. Paddlers should plan for the wet season, typically from October to April, to encounter higher, faster flows, while the dry season offers lower, calmer water. General facilities for a day on the water are available, though their nature and proximity to the stream are not specified. There is no information indicating that paddling is restricted on this waterway.