The Duck River, 284 miles long, is the longest river located entirely within the U.S. state of Tennessee. Free flowing for most of its length, the Duck River is home to over 50 species of freshwater mussels and 151 species of fish, making it the most biologically diverse river in North America, The Duck River is a Class I river for its entire length. The river begins at Normandy Dam near Manchester, TN and flows from East to West in Middle Tennessee. The Duck River flows into the Tennessee River north of Interstate 40. In 2001, the state designated the section that flows through Maury County as a state scenic river.
The Harpeth River is 125 miles in length and originates in Eagleville, TN. It is a major tributary to the Cumberland River. North of Interstate 40 is the The Harpeth River State Park. Sites include several natural, archaeological and historic areas. The park is popular for kayaking, canoeing, fishing and hiking. The Harpeth River is a class I river for its entire length.The lower portion of the Harpeth is designated as a "scenic river" under the Tennessee Scenic Rivers Act.
The Buffalo River is the longest unimpounded river in Middle Tennessee, flowing 125 miles from the southern and western portions of TN. It is the largest tributary of the Duck River. The river is names for the Buffalo Fish which was abundant when the first European settlers arrived. The river is primarily a Class I stream with significant stretches of flat water.
A major tributary of the Cumberland River, Caney Fork is 144 miles long and rises in Cumberland County about six miles northwest of Crossville. The Caney flows northwest to the Cumberland River. It is a peaceful Class I river, with cool, clear water. This section is also known for Rainbow and Brown Trout fishing.
FAB on the Duck is a member of the TN Paddlesports Association. Their mission is to "grow, protect and support Tennessee's paddlesports outfitting businesses by improving members' financial viability, ensuring a fair and reasonable regulatory environment and enhancing members' ease of doing business".