U.S. Highway 85
CanAm Highway
US 85 highlighted in red
Route information
Maintained by NDDOT
Length	255.063 mi[1] (410.484 km)
Existed	1926–present
Major junctions
South end	US 85 at the South Dakota state line
Major intersections	US 12 in Bowman I-94 north of Belfield ND 200 south of Watford City and north of Alexander US 2 by Williston
North end	Hwy 35 at Canada–US border at Fortuna, ND
Location
Country	United States
State	North Dakota
Counties	Bowman, Slope, Stark, Billings, McKenzie, Williams, Divide
Highway system
United States Numbered Highway System List Special Divided North Dakota State Highway System Interstate US State
← US 83 → ND 89

U.S. Route 85 (US 85) is a part of the U.S. Highway System that travels from the Mexican border in El Paso, Texas, north to the Canadian border in Fortuna, North Dakota. In the state of North Dakota, US 85 travels from the South Dakota state line north to the Canadian border.

Route description

US 85 enters North Dakota in the southwest part of the state. The first city on its route is Bowman at the junction of US 12. Continuing north, it passes between North Dakota's two highest points, White Butte and Black Butte. Near Amidon US 85 heads east for nine miles (14 km) before going back north along the Little Missouri National Grassland for about 125 miles (201 km). Near Belfield it junctions with Interstate 94 (I-94). After running concurrently with North Dakota Highway 200 (ND 200), it eventually passes through part of the scenic Badlands, crosses the Little Missouri River and passes near the Theodore Roosevelt National Park (North Unit).

Then, at Watford City it travels west for 16 miles (26 km) where it turns back north before Alexander. US 85 continues north as ND 200 turns west toward Montana. South of Williston it crosses the Missouri River. The stretch from Watford City to Williston is in the process of being converted into an undivided four-lane highway, and it should be substantially completed in 2014.^{[needs update]} A few miles later, it meets with US 2 where the two overlap for 19 miles (31 km) as an expressway that bypasses Williston to the northwest. After US 2 heads east, US 85 continues north to a concurrency with ND 5. From there it is seven miles (11 km) to Fortuna where US 85 heads back north for its remaining six miles (9.7 km) to the Canadian border.^[1]

Major intersections

County	Location	mi[1]	km	Destinations	Notes
Bowman	​	0.000	0.000	US 85 south – Buffalo, Belle Fourche	Continuation into South Dakota
	Bowman	16.461	26.491	US 12 west – Rhame	Southern end of US 12 concurrency
		17.265	27.785	US 12 east – Hettinger	Northern end of US 12 concurrency
Slope	​	50.098	80.625	ND 21 east – New England	Western terminus of ND 21
Stark	​	75.762	121.927	I-94 – Bismarck, Billings	I-94 Exit 42
Billings	No major junctions
McKenzie	​	107.645	173.238	ND 200 east – Killdeer	Southern end of ND 200 concurrency
	Watford City	140.831	226.646	US 85 Bus. north / ND 23 east – Watford City, New Town	Southern terminus of US 85 Bus., western terminus of ND 23
	​	145.659	234.415	US 85 Bus. south – Watford City	Northern terminus of US 85 Bus.
	​	159.344	256.439	ND 68 west – Sidney	Eastern terminus of ND 68
	Alexander	160.505	258.308	US 85 Bus. north – Alexander	Southern terminus of US 85 Bus.
		163.506	263.137	US 85 Bus. south – Alexander	Northern terminus of US 85 Bus.
	​	164.424	264.615	ND 200 west – Fairview, Sidney	Northern end of ND 200 concurrency
Williams	​	183.743	295.706	US 2 west / ND 1804 north – Bainville	Southern end of US 2 and ND 1804 concurrency
	Williston	186.747	300.540	US 2 Bus. east / ND 1804 south	Northern end of ND 1804 concurrency, western terminus of US 2 Bus.
		189.207	304.499	US 2 Bus. west	Eastern terminus of US 2 Bus.
	​	201.265	323.905	US 2 east	Northern end of US 2 concurrency
	​	216.995	349.220	ND 50
Divide	​	240.605	387.216	ND 5 east – Crosby	Southern end of ND 5 concurrency
	Fortuna	248.670	400.196	ND 5 west – Westby	Northern end of ND 5 concurrency
	​	255.063	410.484	Canada–United States border at Fortuna–Oungre Border Crossing
				Hwy 35 north – Weyburn, Regina	Continuation into Saskatchewan
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus