Southern Illinois the Ozarks of Missouri, is chiefly in southern Jackson, Union, northern Alexander and Johnson counties. The eastern area, more closely related to the Wabash Valley Seismic Zone, is mostly in northern Pope, southern Saline, Gallatin, eastern Johnson and southern Williamson counties. The Shawnee National Forest covers a large territory, including seven wilderness areas: Garden of the Gods, Bay Creek, Clear Springs, Bald Knob, Burden Falls, Lusk Creek, and Panthers Den. Of southern Illinois' rivers, only the Mississippi and the Ohio are navigable for modern commerce. The Big Muddy River, Marys River, Saline River and Cache River run their courses in
Muddy Creek (Lamine River) Muddy Creek (Lamine River) Muddy Creek is a stream in Johnson and Pettis Counties in the U.S. state of Missouri. It is a tributary of Lamine River. The stream headwaters arise in southeastern Johnson County just east of the community of Sutherland and Missouri Route 23 at . The stream flows northeast and enters Pettis County about three miles southeast of Whiteman Air Force Base. The stream continues to the northeast passing under Missouri Route 127 three miles south of LaMonte and under U.S. Route 50 three miles west of Sedalia. It crosses under U.S. Route 65 six miles north