Lago Espejo is a glacial lake located in the Los Lagos Department of Neuquén Province, Argentina, near the town of Villa La Angostura along the route known as the Road of the Seven Lakes. The lake covers approximately 30 square kilometers, reaches a maximum depth of 245 meters, and sits at an elevation of 786 meters above sea level. Its name — meaning "Mirror Lake" — reflects the clarity and stillness of its waters, which can mirror the surrounding landscape under calm conditions.

The shoreline alternates between volcanic sand beaches, juncus vegetation, and rock walls, giving the lake a varied character as you paddle along it. The waters are notably transparent, and the lake is fed by numerous streams carrying snowmelt and glacial melt from the surrounding mountains.

Access to the lake is available via Ruta 40, and the main beach area — known as Playa Lago Espejo — serves as the primary put-in point. Parking at this access point is free and organized. Facilities at the beach include a buffet and bathrooms. A kayak rental operation operates from the beach area.

From the main beach, paddling to a small island called La Isleta takes approximately 25 to 30 minutes. The island is only reachable by kayak or swimming. If water levels permit, paddlers can continue up a river from Lago Espejo Chico — the smaller adjacent lake — into a particularly striking natural area. Wind and waves can develop on the lake and create challenging conditions; one account describes a kayak trip around an island becoming difficult in wind and rain, so paddlers should monitor weather carefully before setting out. The lake is best visited on sunny, warm days, as overcast or cold conditions can significantly diminish the experience.

Swimming and kayaking are both practiced on the lake. The water quality is consistently clean and clear. Given the glacial origin and high-elevation snowmelt feeding the lake, water temperatures are likely cold even in summer months. The surrounding area offers mountain biking, trekking, and sport fishing, and the broader landscape includes the Cerro la Mona hiking route nearby. The access road to the lake is rough, so paddlers transporting boats should drive with care.