The Río Blanco in Argentina is a remote and challenging whitewater river located in the Patagonian wilderness. It is characterized by committing gorges and sections of continuous, difficult rapids spanning distances of at least 30 kilometers with no viable exit routes, making it an expedition-level undertaking suitable only for highly experienced kayakers. Access to the river is exceptionally difficult, requiring a hike through very thick and muddy forests where no established trail exists. The river flows into Lago Inexplorado, where paddlers can find sandy beaches suitable for making camp. A notable feature is a significant first gorge that requires scouting. There are indications that access to waterways in Argentina may be restricted to Argentine citizens, with non-citizens potentially prohibited from paddling. The overall experience is one of a serious, multi-day expedition into isolated terrain, demanding advanced skills and thorough preparation for remote wilderness conditions.