Miage Glacier, Alpine glacier in Courmayeur, Italy
Miage Glacier is a valley glacier on the Italian side of Mont Blanc, near Courmayeur, with several ice tongues that flow down toward a terminal lake at its base. Its surface is almost entirely covered by a thick layer of moraine debris, so the ice beneath is rarely visible from above.
The glacier was first described by naturalists and early mountaineers in the 18th century, who noted its unusual debris-covered surface compared to other Alpine glaciers. During the 19th century it became a regular stop for expeditions exploring the Mont Blanc massif from the Italian side.
The Miage Glacier is one of the few glaciers in the Alps whose surface is almost entirely covered by rock debris, giving it an unusual appearance that many visitors do not immediately recognize as ice. This covering of stones and gravel keeps the ice underneath from melting as quickly as exposed glaciers do, which explains why it is still so large today.
The most used access starts from La Visaille on a marked trail that offers clear views of the ice tongues and the lake at the glacier's base. Sturdy footwear is a good idea, and it is worth checking the weather before heading out, as conditions at altitude can change quickly.
At the lower end of the glacier, a small lake has formed where chunks of ice regularly break off and float on the surface, making it one of the few places in the Alps where this can be seen at relatively low altitude. The lake level and shape change from season to season depending on how much ice melts into it.
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