Río Blanco is a stream flowing through the Los Lagos Region of Chile, situated at approximately 41°13′S, 72°37′W in one of Patagonia's most celebrated fishing landscapes. This part of southern Chile is renowned for its cold, clear Andean waterways, volcanic geology, and rich aquatic ecosystems that support exceptional trout fishing. The Los Lagos Region surrounds Río Blanco with a dramatic backdrop of temperate rainforest, volcanic peaks, and glacier-fed lakes, placing it within a broader network of world-class fishing waters that includes Lago Llanquihue, Río Petrohué, and Lago Chapo. The stream's setting reflects the classic character of Patagonian freestone streams — cold, oxygen-rich water flowing through forested riparian corridors with the kind of pristine conditions that sustain healthy wild fish populations.