Ennerdale Water is the most westerly lake in the Lake District National Park in Cumbria, England. It is a glacial lake, with a maximum depth of 150 feet (45 metres), and is ½ mile to a mile (700 to 1,500 metres) wide and 2½ miles (3.9 kilometres) long.The lake lies in the eponymous valley of Ennerdale, surrounded by some of the highest and best-known fells in Cumbria including: Great Gable (899 m), Green Gable, Brandreth, High Crag, Steeple and Pillar. To the west of the lake lies the hamlet of Ennerdale Bridge, consisting of two pubs and a few houses. It is close to the port of Whitehaven.Etymology" 'Anund's valley'. The name Ennerdale seems originally to have derived from 'Anundar', gen. sing. of the ON pers. n. 'Anundr'/'Qnundr', and ON 'dalr' 'valley', but there has been cross-influence between this p.n. and 'Ehen', the name of the river which flows through the valley." (ON is Old Norse.)The lake has been referred to in guidebooks and maps variously as "Brodewater" (1576), "Brodwater" (1695), "Broad Water" (1760), "Ennerdale Water" (1784) and "Ennerdale Lake" in Otley's Guide (1823). It is now the Ordnance Survey convention to name it "Ennerdale Water".