
Hubbard Glacier, Alaska/Canada
Hubbard Glacier is a glacier located in Wrangell-St. Elias National Park and Preserve in eastern Alaska and Kluane National Park and Reserve in Yukon, Canada, and named after Gardiner Hubbard. Before it reaches the sea, Hubbard is joined by the Valerie Glacier to the west. Through forward surges of its own ice, has contributed to the advance of the ice flow that experts believe will eventually dam the Russell Fjord from Disenchantment Bay waters.

It takes about 400 years for ice to traverse the length of the glacier. Meaning that the ice at the foot of the glacier is about 400 years old. The glacier routinely calves off icebergs the size of a ten-story building. Where the glacier meets the bay, 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 the edge of the glacier in Disenchantment Bay. (via Alaska)