Stock Ghyll, also known as Stock Gill, Stock Gill Beck and Stock Beck, is a stream in the district of Westmorland and Furness, in the ceremonial county of Cumbria and the historic county of Westmorland. It flows about four miles from Red Screes through the town of Ambleside to the River Rothay. Its course includes two long-popular tourist attractions, Stockghyll Force and Bridge House. Stock Ghyll has been painted by J. M. W. Turner, John Ruskin, Kurt Schwitters, and many others. Its name derives from Old English stocc, 'tree-trunk', and Old Norse gil, 'a deep glen'.