The longest highway in the United States is U.S. Route 20. This historic highway stretches approximately 3,365 miles from Boston, Massachusetts, in the east to Newport, Oregon, in the west. Established in 1926, U.S. Route 20 traverses several states, including New York, Ohio, and Wyoming, showcasing a variety of landscapes, from urban areas to rural farmlands. The route provides travelers with a unique glimpse of American culture and geography along its lengthy stretch. As a major thoroughfare, it serves as an important commercial route as well as a scenic drive for tourists and road trip enthusiasts.