America’s longest road stretches 3,254 miles across 12 states. Here’s what you’ll see along the way
America’s longest highway is not an interstate. It is U.S. Route 22, a 3,254-mile road that crosses 12 states from Massachusetts to Oregon, according to the Federal Highway Administration and state transportation agencies.
For travelers, the route offers a rare coast-to-coast look at the country in one continuous drive. It connects colonial-era streets in New England with Great Lakes cities, Midwestern plains, Yellowstone country and the cliffs of the Oregon coast.
From Boston streets to the Great Lakes
U.S. Route 22 begins in Boston, where dense city blocks quickly give way to older mill towns and rural stretches in Massachusetts and upstate New York. In western Massachusetts, the road passes through the Berkshires, a region known for rolling hills, small arts communities and summer tourism. It then continues through Albany and across central New York, where lakes, farms and village main streets define much of the drive.
The highway also cuts through Pennsylvania briefly before entering Ohio, where it tracks near Lake Erie. In cities such as Cleveland and Toledo, Route 22 becomes a practical urban corridor as well as a historic travel route. According to transportation historians, the road reflects an earlier era of long-distance travel, before the interstate system shifted much of the country’s traffic to faster, limited-access highways.
Across the Midwest’s plains and farm country
From Ohio, Route 22 runs through Indiana, Illinois and Iowa, linking industrial centers, college towns and broad agricultural land. In northern Indiana, the road passes South Bend, home to the University of Notre Dame, before continuing into the Chicago region. In Illinois, parts of the route overlap with busy suburban corridors, showing how the old highway still serves daily commuters as much as road-trippers.
Farther west, Iowa offers one of the route’s most recognizable rhythms: long open roads, grain elevators and county-seat towns. The highway crosses through Dubuque and then continues past Waterloo and smaller communities shaped by farming and manufacturing. State tourism officials often describe roads like Route 22 as a way to see the working landscape of the Midwest up close, not just its big cities.
Big Sky views, Yellowstone country and mountain passes
The western half of Route 22 shifts dramatically in scale. In Nebraska, Wyoming and Montana, the road opens into longer, quieter stretches marked by ranchland, prairie and wide skies. In Wyoming, the route reaches one of its most famous segments as it passes through Yellowstone National Park, giving drivers access to geysers, wildlife viewing areas and mountain scenery that draws millions of visitors each year.
After Yellowstone, Route 22 continues through Idaho, where volcanic landscapes and high desert terrain replace the forests and rivers found farther east. The highway passes near communities tied to outdoor recreation, agriculture and regional history. Seasonal road conditions can shape travel plans in this part of the country, especially near mountain passes and park areas where weather can change quickly.
The road ends at the Pacific in Oregon
In Oregon, Route 22 crosses the Cascades and heads toward the Willamette Valley before finishing in Newport on the Pacific coast. Along the way, travelers move from dry inland terrain to forested mountains and then to ocean views, making the state one of the route’s most varied final stretches. Newport, the western endpoint, is known for its working waterfront, seafood industry and access to beaches and coastal headlands.
What makes Route 22 matter is not just its length, but the way it ties together very different parts of the United States on one signed highway. Unlike a flight or a fast interstate drive, the road reveals how regions change mile by mile. For many travelers, that is the appeal: one route, 12 states and a cross-section of America that still unfolds at ground level.
