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 County, Pennsylvania summer of 1863, Confederate troops marched through the Cumberland Valley, briefly occupying much of Cumberland County. In the 20th century, the suburbs of Harrisburg, Pennsylvania, the state capital, expanded extensively into eastern Cumberland County. Carlisle also developed suburbs in adjoining townships. According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.9%) is water. It has a hot-summer humid continental climate ("Dfa") and its hardiness zone is 6b except in much of the eastern portion where it is 7a. The area code is 717 with an overlay of 223. As of