Airports near the park include Dickinson-Theodore Roosevelt in Dickinson, ND and Sloulin Field in Williston, ND. Other larger airports with more flights daily are farther away, including Bismarck, ND, Rapid City, SD, and Billings, MT.
Did You Know?
Cannonball concretions can be found along the North Unit Scenic Drive. They were formed by the selective precipitation of mineral-rich groundwater and are nearly spherical because the sandstone in which sand grains were cemented together was of uniform permeability. More...