The Río Aluminé originates at Lago Aluminé in northern Patagonia, Neuquén Province, and flows for nearly 200 kilometers through a transition zone from Andean Patagonian forest to open steppe. The river is notable for its jade-colored, crystal-clear water, through which the riverbed and stones are visible. The banks are lined with large araucaria (monkey puzzle) trees, some of the largest specimens found anywhere, and the surrounding landscape is characterized by mountains, lakes, and volcanic terrain.

The river offers whitewater ranging from Class II to Class IV, making it suitable for a range of paddling abilities. The Abra Ancha Circuit, located approximately 8 kilometers from the town of Aluminé, is a well-known 6-kilometer stretch featuring Class II and III rapids that can be run year-round and requires no prior experience. Higher-gradient Class III and IV sections are best paddled from October to December, when snowmelt brings the river to optimal volume for its full length. Multi-day expeditions are also possible; one operator runs a 6-day river journey beginning near Villa Pehuenia, passing through the town of Aluminé — the only significant settlement along the route — and continuing into more remote terrain. The upper section near Villa Pehuenia carries Class IV water for roughly the first two days before the gradient eases.

The town of Aluminé serves as the primary hub for paddling services, with outfitters offering guided rafting and kayaking, equipment rental, and instruction for all levels. The GPS coordinates 39°19'38.8"S, 70°55'19.1"W are associated with at least one local kayak operation. The river has hosted major national and international competitions, including the World Rafting Championships, reflecting its standing as one of Argentina's premier whitewater venues. Sport fishing, particularly fly fishing for trout, is also practiced on the river and may bring additional users to certain stretches.