The Rio Grande in Chile's Antofagasta Region is a premier destination for anglers pursuing sea-run Brown Trout, known locally as sea trout. This river flows through the dramatic landscapes of Patagonia, offering a unique fishing experience characterized by clear water conditions even during higher flows and banks that are generally free of obstacles, making for excellent casting conditions. The river's environment supports a robust population of these prized fish, which are the dominant species in its waters.