The Longest Highways in the United States

Coast to Coast – U.S Route 20

A highway spanning for 3,365 miles, the US route 20 is the longest road in the United States and the seventh-longest highway in the world. Established in the early 20th century, this historic highway’s one end meets the west coast at Newport and the East coast in Boston.

Route 20 passes through 12 states.

Source: onlyinyourstate.com

An interesting fact about US 20 is that it once ended at the entrance of the Yellowstone national park. The highway was then extended in 1940, with several smaller routes used to cross the park.

Grand Army of the Republic Highway – U.S Route 6

US Route 6 falls second in our list of the six longest highways in the USA. It is also known as the Grand Army of the Republic Highway in honor of the Civil War veterans, and it covers a distance of 3,198 miles.

US Route 6 eastbound

Source: Wikipedia

The south end of route 6 is at Bishop, California, extending all the way towards the east coast at Provincetown, Massachusetts. It once held the title of the longest highway in the US, a claim that was then taken by route 20.

A Ride in the North – U.S Route 30

U.S Route 30 is another coast-to-coast highway in the USA, this time, however, covering the northern side of the country. The length of the highway is 3,073 miles, and it connects Astoria, Oregon, on the west end to the Atlantic City, New Jersey, on the east end.

US Route 30 - Pennsylvania

Source: flickr.com

US 30 also includes the famous Lincoln Highway, commonly known as the first road across America. The route crosses through several notable states such as Nebraska, Iowa, Illinois, Ohio, West Virginia, and Pennsylvania. Additionally, route 30 was a planned coast-to-coast highway, in comparison to route 20, which was later extended.

The Longest Interstate Highway – I-90

Interstate highway 90, spanning for 3,020 miles, is the longest interstate highway in the US. Its eastern end is in Boston, Massachusetts, while its western end resides in Seattle, Washington. This interstate highway is a critical roadway in the road networks of the US, with the highway connecting several significant cities such as Washington, Billings Montana, and South Dakota.

Interstate 90 Crossing the Columbia River in Washington State-USA

Source: Shutterstock.com

Some segments of the I-90 are completely toll-free, while other parts of the highway are based on multiple toll roads. Segments such as Northeast Ohio and Northwestern Pennsylvania are not tolled.

Crossing Through the Loneliest Road in America – Us Route 50

US Route 50 extends from West Sacramento, California to Ocean City, Maryland, and is the 5th longest highway network in the US, stretching over 3000 miles. The highway runs through the center of the US map, and it majorly covers deserts and mountain ranges, along with covering with what is known as the loneliest road in America located in Nevada.

US 50 in Nevada: The Loneliest Road in America

Source: Shutterstock.com

The route then goes on through several farms and large cities in the Midwest, continuing through the Appalachian Mountains in West Virginia. The highway passes through a remarkable 12 states, including Missouri, Colorado, and Kansas, and according to some estimates, the entire journey approximately takes 58 hours to drive.

Keystone Shortway – I-80

Interstate 80 is one of the original interstate highway networks, and it was officially completed in 1986. The second-longest interstate highway in the US spans for a length of about 2,900 miles, and it connects San Francisco, California, on the west coast with Teaneck, New Jersey, on the East Coast.

The Ohio Turnpike (Interstate 80) crosses the Cuyahoga Valley south of Cleveland

Source: Shutterstock.com

The route is notable for tracing multiple historic routes across the US, such as the California Trail and the Oregon Trail. The highway is known explicitly as the Keystone Shortway in the state of Pennsylvania, and it is a toll-free road network in that region.