The Elk River originates on Tennessee's Cumberland Plateau in Grundy County near Burroughs Cove and Elkhead, where Laurel and Jay Creeks converge at approximately 1,010 feet elevation. From this highland beginning, the river flows roughly 195 miles southwest then westward through Middle Tennessee before crossing into northern Alabama, ultimately joining the Tennessee River at Wheeler Lake near Rogersville at 558 feet elevation.

The river's character transforms dramatically along its course. In Grundy County, it tumbles through steep, forested terrain before encountering two major impoundments: Woods Reservoir (created by Elk River Dam) in Franklin County, and Tims Ford Lake (formed by Tims Ford Dam) which extends into Franklin, Coffee, and Moore Counties. Below Tims Ford Dam, the river becomes a cold-water tailwater supporting stocked rainbow and brown trout for approximately 15 miles downstream to the Fayetteville area in Lincoln County.

Paddling opportunities concentrate in two distinct zones. The tailwater section from Tims Ford Dam to Fayetteville offers Class I paddling through clear, cold water with good current and shallow shoals. Multiple access points include Highway 50 at the dam, Farris Creek Bridge, Old Dam Ford, Shiloh Bridge, and Dickey Bridge. This stretch features gravel bars, occasional islands, and excellent trout fishing. The lower Alabama section from the state line near Elkmont through Limestone County to Elk River Mills provides 21.9 miles of gentle Class I paddling on broader, warmer water. Access points include Veto Road, Alabama Highway 127, Easter Ferry Road, and Hatchery Road near Highway 99.

The river maintains navigable flows year-round due to TVA dam control, though spring offers optimal conditions with moderate temperatures and higher flows. Summer paddling remains viable but requires attention to generation schedules. The tailwater section can experience rapid water level changes when the dam releases water.

Wildlife includes great blue herons, egrets, kingfishers, river otters, beavers, deer, and numerous turtle species. The river supports exceptional aquatic biodiversity, including the federally endangered boulder darter (found only in the Elk River drainage), several endangered mussel species, and rare snails. Riparian zones feature hardwood forests, sycamores, and seasonal wildflowers.

Historical significance includes Native American use (the Cherokee called it "Chuwalee"), Civil War-era saltpeter mining in caves near Kelso, and early settlement patterns following the river corridor. The Tims Ford Dam was completed in 1970 for flood control and power generation.

Safety considerations include monitoring TVA generation schedules (423-751-2264), avoiding paddling during high releases, recognizing strainers from fallen trees, and obtaining proper fishing licenses with trout stamps for the tailwater. The lower Alabama section requires awareness of minimal current during low-flow periods.

Multi-day trips are feasible with primitive camping available at Old Dam Ford, Shiloh Bridge, and Farris Creek Bridge, allowing extended exploration of the tailwater's 44-mile paddleable length.