U.S. Route 85 (US 85) is a major north-south United States highway stretching approximately 1,479 miles (2,380 km) from the Mexican border to the Canadian border, passing through the Mountain and Northern Plains states. Established in 1926, it serves as a critical, often rural, transportation artery, integral to commerce, energy transport, and historical trade routes.
The highway begins at the Mexican border in El Paso, Texas—connecting with Mexican Federal Highway 45—and ends at the Canadian border north of Fortuna, North Dakota, where it continues as Saskatchewan Highway 35. Highway 85
US 85 is crucial for transportation in the west, passing through the Little Missouri National Grassland and near Theodore Roosevelt National Park (North Unit). 479 miles (2