and heads north. Between Crow Agency and Billings, US 87 and I-90 are merged with US 212. It intersects with (and briefly merges with) US 12 in Roundup and continues north with a slight bend to the northwest until, at Grass Range it takes a sharp turn to the west at an intersection with Montana State Highway 200. US 87 remains concurrent with Montana State Highway 200 until Great Falls. In Lewistown, it merges with US 191 and remains heading generally west. Some ten miles (16 km) out of Lewistown, it breaks with US 191 and merges with Montana State Highway 3, heading generally northwest and merging briefly with US 89 before breaking with all three in Great Falls. US 87 heads northeast then east to Fort Benton and then generally northeast to its terminus with US 2 about two miles (3 km) west of Havre. History US 87 originally ran northwest out of Great Falls, Montana towards the eastern border of Glacier National Park. US 87 ran to the Canadian Border at the Piegan Border Crossing. This was changed in 1934, when US Route 89 was diverted to US 87's routing to Glacier Park. US 87 ended in Great Falls until circa 1945 when it was extended to its current northern terminus in Havre, Montana. U.S. Route 185 was formed in 1926, and extended from US 85 in Cheyenne north to Orin. It became part of a southern extension and realignment of US 87 in 1936. Major intersections Texas in Port Lavaca in Victoria in Victoria in Cuero. The highways travel concurrently to southwest of Cuero. in San Antonio in San Antonio. I-10/US 87 travels concurrently to Comfort. US 87/US 90 travels concurrently through San Antonio. in San Antonio in San Antonio. I-35/US 87 travels concurrently through San Antonio. on the Balcones Heights–San Antonio city line in Fredericksburg. The highways travel concurrently through Fredericksburg. northwest of Mason. The highways travel concurrently to Brady. in Brady. The highways travel concurrently to Brady. northwest of Brady in Eden in San Angelo. The highways travel concurrently through San Angelo. in San Angelo in Big Spring south of Los Ybanez. The highways travel concurrently to Lamesa. in Tahoka in Lubbock. The highways travel concurrently to south of Kress. in Lubbock in Lubbock in Lubbock in Plainview north-northwest of Tulia. The highways travel concurrently to south-southeast of Happy. in Canyon. The highways travel concurrently