Grand River National Grassland
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About this site
Grand River National Grassland is in northwestern South Dakota, USA. It is named for the Grand River. The North and South forks of the river meet in the grassland.
38 km²). In descending order of acreage it lies in parts of Perkins, Corson, and Ziebach counties. The portion in Corson County also lies within the Standing Rock Indian Reservation.
The portion in Ziebach County also lies within the Cheyenne River Indian Reservation. The grassland is administered by the USDA-Forest Service as part of the Dakota Prairie Grasslands (DPG) from offices in Bismarck, North Dakota. There is a local Ranger District office (shared with Cedar River National Grassland) in Lemmon, South Dakota.
The DPG is part of Region One of the Forest Service. The Regional Headquarters is in Missoula, Montana.
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Start the first trip hereCampground data provided by Recreation.gov · Updated Apr 2026
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