Which national park is located in western North Dakota?

Theodore Roosevelt National Park is the national park located in western North Dakota. Established in 1947, it is named after President Theodore Roosevelt, who was instrumental in the conservation movement and had a deep connection to the area. The park is known for its stunning Badlands topography, diverse wildlife, and historical significance related to Roosevelt's life and conservation efforts.

In contrast, Badlands National Park is situated in South Dakota, while Yellowstone National Park is primarily in Wyoming but extends into Montana and Idaho. Glacier National Park is located in Montana. Therefore, Theodore Roosevelt National Park is the only one listed that can be found in North Dakota, specifically in its western region. This reinforces the link between the park and the state's geographical and historical context.