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Wast Water

Wast Water
Wast water.jpeg
Looking towards Wasdale Head
Wast watercroped.jpg
Map of 1925
Location England
Coordinates 54°26′30″N 3°17′30″W / 54.44167°N 3.29167°W / 54.44167; -3.29167Coordinates: 54°26′30″N 3°17′30″W / 54.44167°N 3.29167°W / 54.44167; -3.29167
Type Ribbon Lake
Primary inflows see list
Primary outflows River Irt
Basin countries United Kingdom
Max. length 3.03 miles (4.88 km)
Max. width 0.49 miles (788.58 m)
Surface area 1.08 sq mi (2.8 km2)
Max. depth 258 feet (79 m)
Shore length1 6.84 mi (11.01 km)
Surface elevation 200 feet (61 m)
1 Shore length is not a well-defined measure.

Wast Water or Wastwater (/ˈwɒst.wɔːtər/ WOST-waw-tər) is a lake located in Wasdale, a valley in the western part of the Lake District National Park, England. The lake is almost 3 miles (4.8 km) long and more than one-third mile (540 m) wide. It is the deepest lake in England at 258 feet (79 m), and is owned by the National Trust. It is one of the finest examples of a glacially 'over-deepened' valley. The surface of the lake is about 200 feet above sea level, while its bottom is over 50 feet below sea level.

The head of the Wasdale Valley is surrounded by some of the highest mountains in England, including Scafell Pike, Great Gable and Lingmell. The steep slopes on the southeastern side of the lake, leading up to the summits of Whin Rigg and Illgill Head, are known as the "Wastwater Screes" or on some maps as "The Screes". These screes formed as a result of ice and weathering erosion on the rocks of the Borrowdale Volcanic Group, that form the fells to the east of the lake, towards Eskdale. They are approximately 2,000 feet, from top to base, the base being about 200 feet below the surface of the lake.


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