Ribeirão Gameleira is a 58-kilometer-long watercourse flowing through the state of Tocantins, Brazil. The river's course is mapped as flowing through the subregions of Tocantins. For paddlers planning a trip, a dedicated website provides information on how to access the river. The site details great paddling access points, boat ramps, and all the necessary facilities required for a day on the water, suggesting that some infrastructure for launching and landing boats exists along its length. The river's character is defined by its 58 km length, and it is noted as having no distributaries or tributaries within the mapped section, indicating a relatively straightforward, singular channel for navigation.