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 Clark Expedition. The segment from Pierre to the Oahe Dam was previously SD 514 prior to 1975. Route description Charles Mix County The southern segment of SD 1804 begins on the eastern shore of the Missouri River, a few miles south of Geddes. It travels just to the east of the Spring Creek and Pease Creek recreation areas, before crossing over Spring Creek. It curves to the northeast and reaches its northern terminus, an intersection with SD 50. Southwest of Platte, SD 1804 resumes at an intersection with 282nd Street east of Platte Creek Recreation Area. At this intersection, the highway utilizes 359th Avenue and travels in a due-north direction. It skirts along the southeastern part of the Gray State Public Shooting Area. It curves to the northeast and travels through the southern part of that area, crossing over Platte Creek in the process. It curves to the southwest, paralleling the creek and then curves back to the north. The highway then travels on the west side of the shooting area. A few miles later, it meets its northern terminus, an intersection with SD 44/SD 50. At this intersection, 359th Avenue continues to the north. Hughes, Sully, and Potter counties SD 1804 resumes again in the northern part of Pierre, at an intersection with US 14/US 83. It curves to a northeastward direction and travels along the eastern edge of the Tailrace Recreation Area. On the northern edge of the recreation area is an intersection with the eastern terminus of SD 204. The highway then slips between the East Shore and Overlook recreation areas. The highway curves to the north and crosses over Spring Creek. SD 1804 then passes the Spring Creek Recreation Area and enters Sully County. It passes the Okobojo Creek Recreation Area before it meets Onida Road