Maramec Spring is located on the Meramec River near St. James in the east-central Ozarks of Missouri. The fifth largest spring in the state with an average discharge of 153 cubic feet (4.3 m) of water per second, it is part of a Karst topographical area, with many springs and caves. The spring and 1800 acres (7.28 km²) are owned by the James Foundation, which maintains the area as a public park, donated by Lucy Wortham James. The Missouri Department of Conservation operates a trout hatchery and fishery at the spring. Ruins of the Maramec Iron Works are still visible at the site; its machinery was partly powered by the spring's waterflow. The spring was declared a National Natural Landmark in October 1971.
