The Beagle Channel separates the main island of Tierra del Fuego from Navarino and Hoste islands.
It is a navigable passage in the southernmost part of South America, extending roughly east–west along the southern edge of the Tierra del Fuego archipelago. Argentina and Chile share the surrounding region, and the channel passes near Ushuaia, Argentina.
The channel was named after HMS Beagle, the survey ship that charted it during voyages in the 1820s and 1830s. Charles Darwin travelled through the area aboard HMS Beagle in 1833 and 1834.
The Beagle Channel is distinct from the Strait of Magellan, which separates mainland South America from Tierra del Fuego, and from the Drake Passage, which lies farther south between South America and Antarctica.