The Hiwassee River originates from a spring on the north slope of Rocky Mountain in Towns County in the northern area of the State of Georgia. It flows northward into North Carolina before turning westward into Tennessee, flowing into the Tennessee River a few miles west of what is now State Route 58 in Meigs County, Tennessee. The river is about …The Hiwassee River originates from a spring on the north slope of Rocky Mountain in Towns County in the northern area of the State of Georgia. It flows northward into North Carolina before turning westward into Tennessee, flowing into the Tennessee River a few miles west of what is now State Route 58 in Meigs County, Tennessee. The river is about 147 miles long.