Lago Deseado is located in the far south of Tierra del Fuego, Argentina, near the border with Chile. The lake is elongated, oriented roughly east-west, and stretches approximately six miles in length. Its pronounced U-shaped valley is a clear indicator of glacial formation — the landscape was carved by ice over long periods, and the lake itself occupies one of the deeper depressions left by that erosion. The Río de la Turba drains the lake at its outlet end.

The surrounding terrain is characterized by dense, intact native forest that gives way abruptly to cragged rock faces at higher elevations. Andean condors are regularly observed soaring above the ridgelines, and the area supports a variety of birdlife including caranchos, loicas, woodpeckers, and kingfishers. The lake is considered one of the finest fishing destinations in all of Tierra del Fuego, with abundant brown and rainbow trout averaging around two kilograms.

Kayaking is an established activity on the lake, with routes along the shoreline offering opportunities for birdwatching and photography. Guided excursions by rigid-inflatable boat are also available through Lodge Deseado, which sits on the lakeshore and serves as the primary base for visitors. The lodge provides accommodation and can connect paddlers with local guides familiar with the area.

Access to Lago Deseado requires a multi-stage journey. From Punta Arenas, Chile, travelers can fly or take a ferry across the Strait of Magellan to Porvenir, followed by approximately four hours of overland travel across the pampa. The remoteness of the location means self-sufficiency is important, and conditions in Tierra del Fuego can be demanding — wind is a persistent factor throughout the region.

The cultural history of the area adds another dimension to any visit. The territory around Lago Deseado was inhabited by the Selk'nam people until roughly a century ago, and the landscape retains a strong sense of that history.