Alacalufes National Reserve is located between Canal Concepción and Strait of Magellan. It is composed of western archipelagos, its landscape is filled with low mountain-like islands and islets, lots of channels and fjords. It was created in 1969.
There are two types of weather within the reserve: "high humidity, mild cold" and, "Isothermal tundra", with a mean temperature of 7.2 °C (45.0 °F) and 6.5 °C (43.7 °F), respectively. Rainfall can reach up to 2,450 mm (96 in) per year.
Vegetation is made up of coastal grasslands and thickets, formations of Coihue and Sphagnum; while fauna is composed of several birds and mammals.
Its area covers parts of the four provinces of Magallanes and Chilean Antártica Region.