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.