Córrego Sumidouro is a short watercourse in Minas Gerais, Brazil, with a total length of approximately 2 kilometers. Its defining geographical characteristic is its interaction with karst topography, where its waters flow into a distinct doline, a funnel-shaped depression roughly 15 meters in diameter. At this feature, the stream forms a waterfall as it enters the cave system known as Córrego do Sumidouro I. This creates a notable sight where surface water dramatically disappears underground, which is the meaning of "sumidouro" in Portuguese. The area's aesthetic is defined by this geological phenomenon, combining a surface stream with subterranean cave features. For paddlers, this indicates a terminus where the navigable waterway likely ends at this significant drop and sinkhole. The specific nature of the waterfall and cave entrance suggests potential hazards, including strong currents near the doline, unstable terrain, and the inherent dangers of confined cave spaces. Paddlers should exercise extreme caution and conduct thorough, on-the-ground reconnaissance due to the presence of this significant hydrological and geological hazard.