State Natural Areas in Illinois

6 verified parks. Illinois has 56 more parks of other kinds.

• Cache River State Natural Area Illinois Department of Natural Resources
• Franklin Creek State Natural Area Illinois Department of Natural Resources
• Goose Lake Prairie State Natural Area Illinois Department of Natural Resources
• Piney Creek Ravine State Natural Area Illinois Department of Natural Resources
• Sielbeck Forest State Natural Area 8 acres · Illinois Department of Natural Resources
• Spitler Woods State Natural Area 39 acres · Illinois Department of Natural Resources