The world's southernmost national park,[5] it is located 12 hours by boat from Puerto Williams in the Cape Horn Archipelago, which belongs to the Commune of Cabo de Hornos in the Antártica Chilena Province of Magallanes y Antártica Chilena Region.

It covers 63,093 hectares (155,906 acres)[1] and is run by the Corporacion Nacional Forestal (CONAF), the Chilean body that governs all national parks in Chile.

Precipitation is high throughout the year: the weather station on the nearby Diego Ramirez Islands, 109 kilometres (68 miles) south-west in the Drake Passage, shows the greatest rainfall in March, averaging 137.4 millimetres (5.41 in); while October, which has the least rainfall, still averages 93.7 millimetres (3.69 in).

In some parts, small wooded areas of Antarctic beech or nire, lenga, winter's bark or canelo, and Magellanic coigüe can be found.

[17] The park has been designated an Important Bird Area (IBA) by BirdLife International because it supports significant populations of southern rockhopper and Magellanic penguins, sooty shearwaters, blackish cinclodes and striated caracaras.