The Río Baker is Chile's largest river, flowing through the Aysén del General Carlos Ibáñez del Campo Region of Patagonia before emptying into the fjords near Caleta Tortel, situated between the Northern and Southern Ice Fields. The river is visually distinctive for its turquoise waters, a characteristic that draws visitors and paddlers to the region.

The Baker is known for its impressive rapids, making it a destination for rafting. Packrafting is also practiced on the river, including at the confluence with the Río Chacabuco. The Río Neff is another notable tributary. The river corridor passes through diverse terrain that includes dense forests and open meadows, and the surrounding landscape supports wildlife such as guanacos, foxes, condors, and the Magellanic woodpecker.

The river terminates near Caleta Tortel, a small town approximately 125 kilometers south of Cochrane via the Carretera Austral and 462 kilometers south of Coyhaique. Caleta Tortel sits at the river's mouth and features boardwalks constructed from Ciprés de las Guaitecas timber winding through the fjords, and has been declared a heritage site. The town represents a logical endpoint for paddlers traveling the lower river. The Baker also holds a reputation for world-class fly-fishing, which means anglers may share the water in certain stretches.