The Rio das Cunhãs is a 113-kilometer-long river located in the Brazilian state of Tocantins. It flows through the Tocantins Map subregion and is characterized by a network of six tributaries. The river's overall character is defined by its significant length, suggesting a journey suitable for multi-day expeditions or extended day trips. For trip planning, this length indicates a substantial waterway that would require careful logistical planning for access points, shuttle arrangements, and potential camping spots along its course. The river's presence in the Tocantins region places it within the Cerrado biome, a vast tropical savanna ecoregion of Brazil, which implies a landscape of gallery forests along the banks, seasonal variations in water flow, and a diverse array of associated wildlife. Paddlers should be prepared for a remote experience typical of rivers in this part of Brazil, with limited immediate access to facilities or amenities directly on the waterway. The extended length and lack of distributaries suggest a primarily single-channel river, which can simplify navigation but also means fewer alternative routes. Seasonality is a critical factor for paddling here, as rivers in the Cerrado experience pronounced wet and dry seasons, dramatically affecting water levels, flow rates, and the feasibility of navigation.