The Oberaletsch Glacier (German: Oberaletschgletscher, meaning Upper Aletsch Glacier) is a valley glacier on the south side of the Bernese Alps, in the canton of Valais. It had a length of 9 km (5.6 mi) with an average width of just under 1 km (0.62 mi) and an area of about 22 km2 (8.5 sq mi) in 1973.
| Oberaletsch Glacier | |
|---|---|
| Oberaletschgletscher | |
 Oberaletschgletscher and Nesthorn (left side) | |
  Oberaletsch Glacier  Oberaletsch Glacier | |
| Location | Valais, Switzerland |
| Coordinates | 46°25′8″N 7°57′27″E / 46.41889°N 7.95750°E |
| Length | 9 km |
 | |
The Oberaletsch Glacier system consists of two approximately equal arms. The eastern one takes its starting point on the south western flank of the Aletschhorn at around 3,700 m (12,100 ft), and joins the western arm (Beichgletscher) in the valley at the foot of the Nesthorn. Then the glacier flows to the south-east towards the Aletsch Glacier without reaching it. The glacier tongue ends at around 2,150 m (7,050 ft). During the Little Ice Age in the middle of the 19th century the glacier was part of the Aletsch Glacier.
The Swiss Alpine Club Oberaletschhütte (2,640 m (8,660 ft)) is above the junction of the two glacier arms and has been accessible to hikers since 2005 with a new trail from Belalp.
The area of the Oberaletsch Glacier, along with the Aletsch Glacier, was declared a UNESCO World Heritage Site in December 2001.
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