Lago Nahuel Huapi is a glacial lake covering approximately 530 square kilometers in the Patagonian Andes of Neuquén province, Argentina, and forms the centerpiece of Nahuel Huapi National Park, one of the world's oldest national parks, established in 1934. The lake's irregular shape produces a series of elongated arms, or brazos, that extend into the surrounding forested mountains, offering paddlers a variety of distinct environments within a single body of water.

The most popular paddling area is Brazo Tristeza, one of the lake's finger-like extensions, which draws kayakers for its length and the views it provides of surrounding peaks including Cerro Capilla and Cerro López. A common day-trip route runs from Bahía López to the entrance of Brazo Tristeza, passing rugged coastlines, waterfalls, and infrequently visited beaches. From this stretch, paddlers can also observe Isla Centinela in the distance. The nearby Lago Perito Moreno, separated from the main lake by the Llao Llao peninsula, offers a calmer, more sheltered alternative that is particularly suitable for less experienced paddlers.

Wind is a notable hazard on the main body of the lake. Conditions can become challenging, and paddlers should plan accordingly, particularly when venturing onto open water away from the protected arms. Guided excursions typically operate out of Bariloche, with put-ins accessible via the Circuito Chico road, passing Punto Panorámico and through the Llao Llao Municipal Park to reach Bahía López.

The lake sits within Nahuel Huapi National Park, which includes strict natural reserves along portions of the shoreline. Guided commercial trips typically run approximately four hours of paddling, often split between morning and afternoon sessions with a break on shore. Equipment commonly provided on guided trips includes double kayaks with rudders, skirts, life jackets, and waterproof outerwear. The summer months (roughly December through March) are the primary paddling season, with the lake also attracting visitors for fishing, hiking, and other outdoor pursuits during this period. Winter use of the broader area shifts toward snow sports, making the warmer months the practical window for kayaking on the lake.