Highway 20 is a major east-west route in the United States, stretching approximately 3,365 miles from Newport, Oregon to Boston, Massachusetts. It is part of the U.S. Highway System and serves as a vital connector for various cities and regions across the country. The highway passes through diverse landscapes, including mountains, plains, and urban areas. Key cities along Highway 20 include Boise, Idaho, Chicago, Illinois, and Cleveland, Ohio. It offers travelers scenic views and access to numerous attractions, making it a popular choice for road trips and cross-country travel.