The River Welland is a lowland river in eastern England, flowing approximately 65 miles from its source in the Hothorpe Hills of Northamptonshire to its estuary at The Wash in Lincolnshire. It passes through towns including Market Harborough, Stamford, Crowland, and Spalding. The river's character changes significantly along its course, from a meandering, feature-rich upper section to a more engineered, drain-like lower section as it enters the Fenlands. It is a significant waterway for coarse fishing, holding a variety of species, and its estuary provides access to saltwater environments.