Furnace Run is a diverse stream system located in Summit County, Ohio, flowing 10.4 miles through a watershed that encompasses parts of Brecksville, Broadview Heights, Richfield, Bath Township, and Boston Township before joining the Cuyahoga River within Cuyahoga Valley National Park. This waterway represents one of the healthiest, most intact tributaries flowing into the Cuyahoga River, offering both warmwater and coldwater fishing opportunities. The stream originates at an elevation of 1,252 feet and drops to 69 feet at its confluence, creating diverse habitat conditions from headwater streams to larger pools. With over 30% of its watershed under protected lands including Summit Metro Parks, Cleveland Metro Parks, and Cuyahoga Valley National Park, Furnace Run maintains relatively good water quality despite urbanization pressures in its upper reaches.