Meramec River

Tributary of the Mississippi River rising in the Ozark Mountains, near Salem in Dent county, southeast Missouri, U.S. The river winds 207 miles (333 km) generally north, northeast, and southeast through the limestone Meramec Caverns and Meramec State Park (near Sullivan) to enter the Mississippi River 20 miles (32 km) below St. Louis. Lead was mined along its banks in the 1700s, and the river