Eyre Fjord penetrates the mainland of southern Chile from the Icy Channel about 20 miles to the broad face of the massive Pio XI glacier, also known as the Brüggen Glacier. It is the longest glacier in the Southern Hemisphere outside Antarctica, flowing some 40 miles from the Southern Patagonian Ice Field to the fjord. It is also one of the very few advancing glaciers on earth. The glacier face is located near a large eastern arm of Eyre Fjord called Exmouth Fjord.