Middle Fork River State Forest
Middle Fork River State Forest is a recognized dark sky location in Illinois for stargazing and astronomy activities.
It is designated by DarkSky International (IDS) as a Dark Sky Park, which is internationally recognized for preserving a dark sky experience.
Bortle
Middle Fork River State Forest is rated BORTLE CLASS 2.
Type
As a U.S. state forest, dispersed camping, also known as boondocking, is permitted away from car/RV campsites. This allows you to find even darker skies. A permit may be required.
For more info, see their website. See also all dark sky places in IL.