Theodore Roosevelt National Park
Theodore Roosevelt National Park is a recognized dark sky location in North Dakota for stargazing and astronomy activities.
Bortle
Theodore Roosevelt National Park is rated BORTLE CLASS 3.
Star party:
Theodore Roosevelt hosts a popular large star party annually.
Type
As a U.S. national park, various camping options may be available, including frontcountry, dispersed (boondocking), and backcountry (backpacking/primitive). A permit may be/is required.
For more info, see their website. See also all dark sky places in ND.