North Dakota Highway 1804

x70px North Dakota Highway 1804
	Lewis and Clark Trail
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Route information
	Maintained by NDDOT
Length:	342.805 mi (551.691 km)
Major junctions
South end:	SD 1804 near Pollock at South Dakota border
	I-94 in Bismarck; US 83 from Bismarck to east of Garrison; US 85 west of Williston; US 2 west of Williston;
North end:	S-327 at Fort Union Trading Post at Montana border
Location
Counties:	Emmons, Burleigh, McLean, Mountrail, Williams
Highway system

North Dakota Highway 1804 (ND 1804) is a state highway in the U.S. state of North Dakota. ND 1804 and ND 1806 were named to reflect the years of Lewis and Clark's travels through the area, and together constitute the portion of the Lewis and Clark Trail that runs through North Dakota along the northeast and southwest sides of Lake Sakakawea and the Missouri River, respectively.^[1]

Route description

Highway 1804 begins at the border between North Dakota and South Dakota near Pollock, South Dakota, and continues uninterrupted along the north east side of the Missouri River through Emmons, Burleigh, McLean, Mountrail, and Williams counties. At the intersection of Bismarck Expressway in Bismarck, the highway temporarily splits into a separate northbound route (concurrent with 9th Street) and southbound route (concurrent with 7th Street) until both roads terminate at E Boulevard Avenue in front of the North Dakota State Capitol grounds. Further north in Bismarck, ND 1804 intersects Interstate 94, from which it runs concurrent with US 83 for a short distance.

Just north of Bismarck, US 1804 diverges from US 83 to closely follow the Missouri River. It once again runs concurrent with US 83 until just northeast of Lake Sakakawea, where US 1804 permanently diverges west to closely follow the lake. At Williston, a brief concurrence with US 2 and US 85 begins and ends as ND 1804 dips south alongside the Missouri River to meet its final terminus at Montana Secondary Highway 327 in the Fort Union Trading Post National Historic Site.

Major Junctions

County	Location	mi^[1]	km	Destinations	Notes
Emmons		0.000	0.000	SD 1804	continuation into South Dakota
Emmons		28.902	46.513	ND 13
Burleigh	Bismarck	78.575	126.454	ND 810 (Bismarck Expressway)
	Bismarck	81.221	130.713	I-94 / US 83 (State Street)	south end of first US 83 concurrency
		82.973	133.532	US 83	north end of first US 83 concurrency
McLean		113.383	182.472	US 83	south end of second US 83 concurrency
	Washburn	120.147	193.358	ND 200A
	Underwood	132.382	213.048	ND 200	south end of ND 200 concurrency
		139.676	224.787	ND 200	north end of ND 200 concurrency
	Coleharbor	143.474	230.899	ND 48
				Lake Sakakawea
		151.741	244.203	US 83 ND 37	north end of US 83 concurrency south end of first ND 37 concurrency
		185.218	298.079	ND 37	north end of first ND 37 concurrency
		213.688	343.898	ND 37	south end of second ND 37 concurrency
Mountrail		230.575	371.074	ND 37 ND 23	north end of second ND 37 concurrency east end of ND 23 concurrency
		240.540	387.112	ND 8
	New Town	247.145	397.741	ND 23	west end of ND 23 concurrency
Williams	Williston	317.979	511.738	US 2	east end of US 2 concurrency
	Williston	319.826	514.710	US 2
		322.521	519.047	US 85	west end of US 85 concurrency
		341.054	548.873	ND 58	west end of US 85 concurrency
		324.991	523.022	US 2	west end of US 2 concurrency
		341.054	548.873	ND 58
		342.805	551.691	S-327	continuation into Montana
Concurrency terminus