Narrower Terms (20)

• Badlands National Park (S.D.)
• Black Elk Wilderness (S.D.)
• Black Hills National Forest (S.D. and Wyo.)
• Blood Run National Historic Landmark (Iowa and S.D.)
• Buffalo Gap National Grassland (S.D.)
• Custer National Forest (Mont. and S.D.)
• Dakota Tallgrass Prairie Wildlife Management Area (N.D. and S.D.)
• Fort Pierre National Grassland (S.D.)
• Grand River National Grassland (S.D.)
• Karl E. Mundt National Wildlife Refuge (S.D. and Neb.)
• Lacreek National Wildlife Refuge (S.D.)
• Lake Andes National Wildlife Refuge (S.D.)
• Minuteman Missile National Historic Site (S.D.)
• Missouri National Recreational River (Neb. and S.D.)
• Mount Rushmore National Memorial (S.D.)
• Nebraska National Forest (Neb. and S.D.)
• Norbeck Wildlife Preserve (S.D.)
• Sand Lake National Wildlife Refuge (S.D.)
• Waubay National Wildlife Refuge (S.D.)
• Wind Cave National Park (S.D.)