Lang Glacier, Alpine glacier in Valais, Switzerland.

Lang Glacier is an expanse of ice nestled high in the Valais Alps, characterized by a complex terrain of crevasses and seracs that shift with the seasons. The ice field descends through steep valleys, with its surface revealing layers of compressed snow and glacier melt patterns.

At its Little Ice Age maximum in the mid-19th century, Lang Glacier reached about two kilometres further down the Lötschen valley than it does today. It shrank by more than 400 metres between 1973 and 2010, interrupted by a short advance in the 1980s. In 1973 it covered 10.1 km² and was about 6.9 km long; by 2005 its length was given as 6.6 km.

The glacier feeds the Lonza, which carries its meltwater through the Lötschental to the Rhône. Above the ice, on a rock spur of the Anengrat near the Lötschenlücke, stands the Hollandiahütte of the Swiss Alpine Club at 3240 m, a staging post on glacier tours from the Lötschental toward the Jungfraujoch or the Grimsel Pass.

Reaching this location demands good physical fitness and proper alpine gear for high-altitude terrain. Visitors should check local conditions before traveling and arrange experienced guidance for safe exploration.

The glacier's forefield is listed in Switzerland's national inventory of landscapes of this type. Near the Lötschenlücke, at 3,240 m on a rock spur of the Anengrat, the Hollandiahütte of the Swiss Alpine Club serves as a stage on glacier tours from the Lötschental to the Jungfraujoch or the Grimsel Pass.