Johnson Shut-Ins State Park is located on the Black River in Missouri, just south of St. Louis. This makes it a popular location on hot summer days, especially weekends. If you plan to go, make a reservation by calling toll free 877-ICampMO (877-422-6766). This is a State Park with about 80 walk-in, basic, electric, sewer/electric/water and equestrian campsites. Some of the sites have wooden platforms. The park also has a small store located in the center of the campground. Swimming is popular at the park. The “shut-ins” are rock formations where the river is limited by hard rock that it is cutting through. In these shut-ins, the river cascades over and around smooth-worn rock, creating a natural water park. There is also hiking and rock climbing.