Why Los Glaciares National Park
Los Glaciares National Park is a federal protected area located in the Santa Cruz Province of Argentina. Covering 726,927 hectares, it holds the distinction of being the largest national park in the country. Established in May 1937 and later designated a UNESCO World Heritage Site in 1981, the reserve preserves a well-maintained environment featuring both Magellanic subpolar forests and the west Patagonian steppe. To the south, the reserve shares a border with Chile's Torres del Paine National Park.
The park takes its name from the massive Andean ice cap, which is the largest body of ice outside Antarctica, Greenland, and Iceland. This expanse feeds 47 major glaciers, 13 of which drain toward the Pacific Ocean. Because of the sheer scale of the ice field, these glaciers originate at an elevation of only 1,500 meters and descend down to 200 meters, unlike glaciers elsewhere in the world that typically begin above 2,500 meters. Ice covers roughly 30 percent of the park's total surface area.
Geographically, the territory is separated into two main sectors centered around large lakes that feed the east-flowing Santa Cruz River. The southern portion contains Lake Argentino, the country's largest lake, alongside notable ice formations such as the Perito Moreno, Upsala, and Spegazzini glaciers. Perito Moreno can be reached by land, whereas excursion boats navigate around floating icebergs to reach Onelli Bay and the otherwise inaccessible Spegazzini and Upsala glaciers. The northern portion encompasses Lake Viedma, the Viedma Glacier, and renowned peaks like Mount Fitz Roy and Cerro Torre. Between these halves lies an undeveloped central area without lakes.
The environment hosts diverse habitats, transitioning from moist Magellanic subpolar forests filled with lengas, guindos, and ñires to the dry Patagonian steppe. Local wildlife includes guanacos, cougars, rheas, huemul deer, torrent ducks, and over 100 bird species, including condors and eagles. However, the region faces ecological challenges from forest fires, overgrazing, and introduced species such as cattle, European hares, and non-native trout, which have impacted native fauna like the South American gray fox.
Los Glaciares experiences a cool, damp temperate climate with an even distribution of precipitation year-round, including frequent snowfall during colder months. Average temperatures range from 0.6 °C in winter to 13.4 °C in summer, though high-altitude regions average around −3 °C. Visitors typically access the park via El Calafate, a lakefront city housing the park's administrative headquarters, or El Chaltén, a village located at the base of Mount Fitz Roy. Trekking, mountain climbing, boat tours, and visits to Lago Roca and Lago del Desierto are key activities within the region.
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