Ullswater is the second-largest lake in the Lake District, stretching seven miles long and half a mile wide through the heart of Cumbria, England. This classic glacial lake is renowned as one of the finest fishing waters in the Lake District, celebrated for both the quality and numbers of its wild fish. The lake's glacial origins give it a characteristic low-fertility profile with exceptionally clear, deep water — in places exceeding 100 feet in depth within just a few yards of the shoreline. The fertile, shallow bays support dense beds of aquatic vegetation, particularly potamogeton weed, which serve as the primary habitat for much of the lake's fish life. Ullswater is one of only a handful of locations in the world where the critically endangered schelly can be found, making it a water of genuine conservation significance as well as outstanding angling value.