SR 266 then becomes undivided and continues east to an intersection with SR 102 (Nissan Drive), where Sam Ridley Parkway officially end and SR 266 continues east as Jefferson Pike. The highway then narrows to 2-lanes and crosses a bridge over the Stones River just south of Percy Priest Lake, where it leaves Smyrna. SR 266 then passes through rural areas to come to have an interchange with I-840 (Exit 61) before passing through Walterhill and having an intersection with US 231/SR 10.
SR 266 splits into a single lane and travels east to meet SR 102 (Nissan Drive), signifying the conclusion of Sam Ridley Parkway, after which it becomes Jefferson Pike. The highway then reduces to two lanes and crosses a bridge over the Stones River near Percy Priest Lake, exiting Smyrna. It then passes through rural regions before reaching an interchange with I-840 (Exit 61) and intersecting US 231/SR 10 in Walterhill.