South Dakota Highway 1804
South Dakota Highway 1804 (SD 1804) is a state highway in the U.S. state of South Dakota. It consists of four disconnected segments. The southernmost segment is in the central part of Charles Mix County. It travels from the shore of the Missouri River south of Geddes north to an intersection with SD 50 also south of Geddes. The second segment is in the northwestern part of Charles Mix County. It travels from an intersection with 282nd Street southwest of Platte to an intersection with SD 44/SD 50 southeast of Academy. The third segment is in the central part of the state. It travels from an intersection with US 14/US 83 in Pierre north to an intersection with 160th Street north-northeast of Forest City. The fourth segment, which is the longest segment, travels from a continuation of 135th Street south-southeast of Glenham northward to the North Dakota state line. Here, it intersects 102nd Street and continues as ND 1804. The segments from Pierre to US 212 and from Mobridge to the North Dakota state line are parts of the Lewis and Clark Trail. The number for SD 1804 and SD 1806 are numbered from the years of the Lewis and