Río Claro is one of the most beautiful and storied rivers in Tierra del Fuego, Argentina, flowing as a major tributary into Lago Fagnano (also known as Lago Kami), the largest lake on the island. The river carries a legendary reputation among local anglers — for decades it was closed to sport fishing due to overharvesting, including netting at the mouth, which decimated its population of large brown trout. After years of protection, the river has been reopened to carefully regulated sport fishing, and it now offers a genuinely wild and remote angling experience. The water takes on a distinctive emerald and cloudy hue, characteristic of glacially influenced Fuegian rivers, and the surrounding landscape of dense Nothofagus forest and peat bogs makes the journey to the river as memorable as the fishing itself. Reaching the authorized fishing section typically requires a significant hike — roughly an hour or more through forest and peatland — making this a destination for anglers who appreciate true wilderness fishing.