Cod Beck is a river in North Yorkshire, England. It has a catchment area of . The river extends for from above Cod Beck Reservoir at Osmotherley on the edge of the North York Moors through Thirsk and on to join the River Swale at Topcliffe. Cod Beck has a long history of flooding Thirsk and a feasibility study completed in April 2005 recommended additional flood defences and upstream storage. In 2011, a proposed flood defence scheme in Thirsk was cancelled due to the Environment Agency having its budget cut by 41%. The name Cod Beck is a derivative of Cold Beck, where beck is smaller than a river; the stream runs deep between banks, so is always fairly cool. Cod fish are not found in fresh water. Settlements from source Osmotherley Ellerbeck Foxton Kirby Sigston Thornton-le-Street North Kilvington South Kilvington Thirsk Sowerby Dalton (Joins Swale) References External links Hambleton District Council page on Cod Beck. Cod Beck at Thirsk Wildlife News: Salmon return to North Yorkshire river. Photographs of Cod Beck flooding, 1999 Cod Beck