The Rio Soninho is a river in the state of Tocantins, Brazil, and serves as a headwater for the Do Sono River. It is located within the Jalapão region, near the towns of Ponte Alta do Tocantins and São Félix do Tocantins. The river is primarily known for its rafting experiences, which are commercially offered by local operators like Nação Jalapão Rafting. A typical commercial rafting route covers approximately 12 to 13 kilometers and takes nearly two hours to descend. The river's character is defined by clear, crystalline waters flowing through a natural landscape dotted with several beautiful waterfalls, such as the Cachoeira do Soninho. The scenery along the route includes wonderful landscapes and native birds, contributing to an exciting and visually appealing paddling environment. The clear water quality and the presence of cascades indicate a generally clean and aesthetically pleasing river. The overall vibe is one of an adventurous descent through a scenic, natural area popular for organized water activities.