Interstate 70 is an Interstate Highway in the United States that runs from Interstate 15

Interstate 15 in Utah

In the U.S. state of Utah, Interstate 15 runs north–south through the southwestern and central portions of the state, passing through many of the population centers of that state, including St. George, Provo, Salt Lake City, and Ogden, the latter three being part of the urban area known as...

 near Cove Fort, Utah

Cove Fort, Utah

Cove Fort is a fort and historical site located in Millard County, Utah. It was founded in 1867 by Ira Hinckley at the request of Brigham Young. One of its distinctive features is the use of volcanic rock in the construction of the walls, rather than the wood used in many mid-19th century...

, to a Park and Ride

Park and ride

Park and ride facilities are car parks with connections to public transport that allow commuters and other people wishing to travel into city centres to leave their vehicles and transfer to a bus, rail system , or carpool for the rest of their trip...

 near Baltimore, Maryland. It was the first Interstate Highway project in the United States. I-70 approximately traces the path of U.S. Route 40

U.S. Route 40

U.S. Route 40 is an east–west United States highway. As with most routes whose numbers end in a zero, U.S. 40 once traversed the entire United States. It is one of the original 1920s U.S. Highways, and its first termini were San Francisco, California, and Atlantic City, New Jersey...

 (and also the old National Road

National Road

The National Road or Cumberland Road was the first major improved highway in the United States to be built by the federal government. Construction began heading west in 1811 at Cumberland, Maryland, on the Potomac River. It crossed the Allegheny Mountains and southwestern Pennsylvania, reaching...

) east of the Rocky Mountains

Rocky Mountains

The Rocky Mountains are a major mountain range in western North America. The Rocky Mountains stretch more than from the northernmost part of British Columbia, in western Canada, to New Mexico, in the southwestern United States...

. West of the Rockies, the route of I-70 was derived from multiple sources. I-70 is the fifth longest Interstate Highway, after I-90, I-80, I-40, and I-10.

The construction of I-70 in Colorado and Utah is considered an engineering marvel as the route passes through the Eisenhower Tunnel

Eisenhower Tunnel

The Eisenhower Tunnel, officially the Eisenhower–Johnson Memorial Tunnel, is a dual-bore, four-lane vehicular tunnel approximately west of Denver, Colorado, United States. The tunnel carries Interstate 70 under the Continental Divide in the Rocky Mountains. With a maximum elevation of above sea...

, Glenwood Canyon

Glenwood Canyon

Glenwood Canyon is a rugged scenic canyon on the Colorado River in western Colorado in the United States. Its canyon walls climb as high as above the Colorado River. It is the largest such canyon on the Upper Colorado...

, and the San Rafael Swell

San Rafael Swell

The San Rafael Swell is a large geologic feature located in south-central Utah, USA about 30 miles west of Green River, Utah. The San Rafael Swell, approximately by , consists of a giant dome-shaped anticline of sandstone, shale, and limestone that was pushed up during the Paleocene Laramide...

.