Hubbard Glacier, longest tidewater glacier in North America,
begins its 76 mile journey to the sea on the slopes of Mount
Logan, the tallest mountain in Canada and part of the largest
non-polar ice field in the world. At the point where it enters
Disenchantment Bay, at the head of Yakutat Bay, it is 6 miles
wide. 
 The ice at the foot of Hubbard Glacier is about 400 years
old: it takes that long for ice to traverse the length of the glacier.
The glacier routinely calves off icebergs the size of a ten-story building.
Where the glacier meets the shore, most of the ice is below the waterline,
and newly calved icebergs can shoot up quite dramatically, so that ships
must keep their distance from it as they ply their way up and down the
coast.
 
Hubbard Glacier is the only glacier in the world that does not move at a glacial pace. Nicknamed the "Galloping Glacier", Hubbard moves faster than almost any other glacier on the continent. In fact, in 1986, Hubbard Glacier moved an average of just under 5.5 feet per hour.