Lago Espejo (sometimes called Espejo Grande to distinguish it from the smaller Lago Espejo Chico nearby) is a stunning glacial-tectonic lake nestled in the Los Lagos Department of Neuquén Province, in Argentine Patagonia. Situated at an elevation of 786 meters (2,579 feet) above sea level within Nahuel Huapi National Park, it lies near the town of Villa La Angostura and holds the distinction of being the first lake along the famous Camino de los Siete Lagos — and the warmest of the seven. The lake's name translates to "Mirror Lake," a fitting tribute to its exceptionally clear, calm waters that reflect the surrounding Andean forests, snow-capped peaks, and volcanic shorelines like a perfect mirror. Fed by snowmelt and glacial runoff from the surrounding mountains through several tributaries — including Arroyo Ayhuin, Arroyo Cuerno, Arroyo Cacho, Arroyo Clou Clouco, and Arroyo Gliunco Hue — Lago Espejo is a cold, oligotrophic lake covering approximately 30 square kilometers with a maximum depth of 245 meters (804 feet). Its shoreline is a varied and beautiful mix of volcanic sand beaches, juncus reed beds, and steep rocky walls, all framed by the lush Valdivian temperate rainforest of the Andes. For the fly angler especially, this is a destination that combines world-class fishing with some of the most breathtaking scenery on earth.