Overview Silver Mines Campground is located on the St. Francis River in the Mark Twain National Forest. It offers a variety of recreational opportunities and abundant historic and geological wonders. Recreation Parts of the river are available for swimming, while other portions provide good fishing. Whitewater kayaking is a popular activity during the springtime when water runs high. Depending on water levels, the state holds an annual kayaking competition the third weekend of March. The 2-mile