U.S. Route 20 is the longest road in the United States, stretching approximately 3,365 miles from Boston, Massachusetts in the east to Newport, Oregon in the west. It passes through a variety of landscapes, including mountains, plains, and urban areas, making it a popular route for travelers seeking diverse scenery. Established in 1926, U.S. Route 20 connects many significant cities and attractions along its path. Notable stops include Chicago, Illinois, Yellowstone National Park, and Cleveland, Ohio. The highway serves as an important corridor for commerce and tourism, reflecting the rich history of American road travel.