The Dearborn River is a tributary of the Missouri River, in central Montana, it rises in western Lewis and Clark County, is a county located in Montana, in which country?
Dearborn River: The Dearborn River is a tributary of the Missouri River, approximately 70 mi (113 km) long, in central Montana in the United States. Lewis and Clark County, Montana: Lewis and Clark County is a county located in the U.S. state of Montana.
United States