The River Rother is a 27-mile lowland river flowing through Derbyshire and Yorkshire, rising near Clay Cross and passing through Chesterfield, Rother Valley Country Park, and suburbs of Sheffield before joining the River Don at Rotherham. Historically one of the most polluted rivers in Europe due to industrial and mining waste, it has undergone significant recovery through major investment in sewage treatment and industrial effluent management. The river now supports a mixed coarse fishery, though it retains a poor water quality status that impacts fish populations and catch rates. A five-year restoration and restocking program is actively working to improve the river's ecology. The fishery offers diverse coarse fishing opportunities across its length, with sections providing free public fishing access alongside areas controlled by angling associations.