The area of Lyndon B. Johnson National Historical Park is 6,353,564.583168 square meters.
The area of Lake Lyndon B. Johnson is 26.442 square kilometers.
The area of Comanche National Grassland is 1,793.085 square kilometers.
The area of Oglala National Grassland is 382.509 square kilometers.
The area of Pawnee National Grassland is 781.286 square kilometers.
The area of Caddo National Grassland is 72.329 square kilometers.
The area of Kiowa National Grassland is 552.06 square kilometers.
The area of Sheyenne National Grassland is 284.008 square kilometers.
The area of Cedar River National Grassland is 27.183 square kilometers.
The area of Crooked River National Grassland is 454.693 square kilometers.
The area of Butte Valley National Grassland is 74.563 square kilometers.
The area of Rita Blanca National Grassland is 376.313 square kilometers.