Beagle Channel is a strait  in Tierra del Fuego Archipelago on the extreme southern tip of South America partly in Chile and partly in Argentina. The channel separates the larger main island of Isla Grande de Tierra del Fuego from various smaller islands including the islands of Picton, Lennox and Nueva; Navarino; Hoste; Londonderry; and Stewart. The channel's eastern area forms part of the border between Chile and Argentina and the western area is entirely within Chile.