Dark Sky Locations in Illinois
Milky Way Planner has pages for 3 dark sky places in Illinois: 1 community, 1 park and 1 urban night sky place. Their Bortle classes run from 6 to 9. Each page has the Bortle class, the best months for the Milky Way and a free visibility calendar.
- Hawthorn Woods International Dark Sky Community
Community · Bortle 8
- Middle Fork River Forest Preserve International Dark Sky Park
Park · Bortle 6
- Palos Preserves Urban Night Sky Place
Urban night sky place · Bortle 9