Lake Windmill is located east of the Irish Sea and within the lake area of Northwest England. It is the largest lake in England. Located in the middle of the two basins, the basin is a series of islands opposite the town of Bowness on the East Bank of the lake. The lake is long and narrow, with the deepest part at the North end. Located on the northwest coast of England, the lake area is 2,300 square kilometers near the Scottish border. It was classified as a national park in 1951 and is the largest of 11 national parks in England and Wales.