Elkhorn Ranch References Elkhorn Ranch park unit, North Dakota, United States Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Theodore Roosevelt National Park…South Unit, and the central Elkhorn Ranch—and has a total area of 110 square miles (285 square km). Park headquarters are in the South Unit at Medora. Read More…South Unit, and the central Elkhorn Ranch—and has a total area of 110 square miles (285 square km). Park headquarters are in the South Unit at Medora. Read More