The Tellico River is a river in the Blue Ridge Mountains of western North Carolina and eastern Tennessee. It rises in the westernmost mountains of North Carolina, and then flows through Monroe County, Tennessee, before joining the Little Tennessee River under the Tellico Reservoir. With a length of 52.8 miles, it is a major tributary of the Little Tennessee Riv…The Tellico River is a river in the Blue Ridge Mountains of western North Carolina and eastern Tennessee. It rises in the westernmost mountains of North Carolina, and then flows through Monroe County, Tennessee, before joining the Little Tennessee River under the Tellico Reservoir. With a length of 52.8 miles, it is a major tributary of the Little Tennessee River, and is one of the primary streams draining the Unicoi Mountains.