Lago Huechulafquen is a stunning glacial lake nestled in Parque Nacional Lanín in Neuquén Province, Argentina, set against the dramatic backdrop of the majestic Lanín volcano right on the border with Chile. Part of a trio of connected lakes along with Epulafquen and Paimún, this enormous combined water system offers impressively diverse fishing opportunities across an expansive and visually spectacular landscape. The lake's shores are lined with distinctive volcanic beaches of black sand — a hallmark of the volcanic geology of the region — and the surrounding terrain reflects the deep cultural heritage of the indigenous Mapuche people who call this area home. As an oligotrophic lake within the national park, Huechulafquen's waters are exceptionally clear, supporting healthy populations of introduced salmonid species that have made this region one of South America's premier trout fishing destinations. The lake also serves as the headwaters of the famous Río Chimehuín, which originates here and flows southeast for roughly 33 miles before joining the Collón Curá.