Great Miami River

Hamilton County, Ohio.

Great Miami River midpoint in Dayton, Ohio.

Great Miami River ends in Petersburg, Kentucky.

456 feet (139 meters)

160.44 miles long (258.20 kilometers)

1832267.24 miles (2948749.21 sq kilometers)

About The Great Miami River

Great Miami River is a River located in Hamilton County, OH. Starting in Russells Point, OH the Great Miami River flows 160 miles through Dayton, OH before ending in Petersburg, KY. The Great Miami River rises to an elevation of 456 feet and has a surface area of 1,138,518 square miles. Find maps, fishing guides, weather and recreation information at Guidesly.


About Great Miami River, OH

The Great Miami River is a 160-mile long tributary of the Ohio River, meandering across the state lines of Ohio and Lawrenceburg in Indiana. It flows through Dayton, Piqua, Troy, Hamilton, Huber Heights, Vandalia, and Sidney. Sourcing from the outflow of Logan County’s Indian Lake, an artificial reservoir, the river flows south and southwest joined by Loramie Creek in northern Miami County. The river is joined as well by the Stillwater River, Mad River, Wolf Creek, and Whitewater River from Dayton to Hamilton County as it reaches its mouth at the Ohio River.

The French have dubbed the river as Riviere à la Roche meaning ‘River of the Rocks’ during the 1700s. The Great Miami watershed has taken part in the building of the Miami and Erie Canal, which connected the Ohio River with Lake Erie. Water from the Great Miami fed into the canal, which later was extended with the Sidney Feeder. At the beginning of the 19th century, the river served as a source of water and an area of waste disposal for different major industrial firms. Heightened attention to the water pollution in the late ’50s and ’60s has led to massive improvements in the waste disposal and water quality.