Photo credit: National Forest Service

Cedar River National Grassland is located in Sioux County and Grant County in southern North Dakota, United States. It has a land area of 6,717 acres (2,718 ha). The portion in Sioux County lies within the Standing Rock Indian Reservation. Within the grassland are topographic features such as level plains and rolling hills. Dry streams and some small flowing streams exist throughout the grasslands.

https://www.fs.usda.gov/recarea/dpg/recarea/?recid=79471