Tennessee State Route 251 Tennessee State Route 251 State Route 251 (SR 251) is a west–east secondary state highway in Middle Tennessee. SR 251 begins in rural Cheatham County at an intersection with SR 249 (Sams Creek Road/River Road) south of Ashland City. It winds its way southeast along the banks of the Cumberland River as River Road to cross into Davidson County. It continues southeast as River Road Pike as it enters Nashville and has an intersection with US 70/SR 24 (Charlotte Pike), where SR 251 becomes part of Old Hickory Boulevard. It then continues south to have an interchange with I-40 (Exit
Cumberland Mountain State Park River) near Crab Orchard. Cumberland Mountain State Park forms a semicircle around Byrd Creek and Threemile Creek, with Byrd Lake being the eastern or "closed" half of the circle. The park's main entrance is located along Tennessee State Route 419 (Pigeon Ridge Road) just west of Homestead. U.S. Route 127, which intersects TN-419 at Homestead, connects the area with Crossville and Interstate 40 to the north and the Sequatchie Valley to the south. Tennessee State Route 68, which also intersects US-127 at Homestead, connects the area to Spring City in the Tennessee Valley to the east. In 1933, at the