U.S. Route 287 (US 287) is a north–south (physically northwest–southeast) United States highway. At 1,791 miles (2,882 km) long, it is the second longest three-digit U.S. Route, behind US 281. The highway is broken into two segments by Yellowstone National Park, where unnumbered park roads serve as a connector.
The highway's northern terminus is in Choteau, Montana, 100 miles (160Â km) south of the Canadian border, at an intersection with USÂ 89. Its southern terminus (as well as those of USÂ 69 and USÂ 96) is in Port Arthur, Texas at an intersection with State Highway 87 (SHÂ 87), five miles (8Â km) up the Sabine River from the Gulf of Mexico. It intersects its parent route USÂ 87 twice, overlapping it from Amarillo to Dumas, Texas, and then crossing it in Denver, Colorado.