Río Ñuble is a river located in the Biobío region of Chile, flowing through one of the country's most scenic and productive trout fishing landscapes. Known primarily for its populations of brown trout and rainbow trout, this river draws fly anglers and spin fishers alike who are drawn to its wild character and the quality of fish it holds. The Ñuble drains a mountainous watershed and carries the hallmarks of a classic Andean freestone river — clear, cold water, varied structure, and the kind of remote beauty that makes a day on the water memorable regardless of what ends up in the net.