The trails of Lewis & Clark Caverns State Park allow the visitor to enjoy and experience many aspects of the park above and beyond the caverns. There are over 3,000 acres of terrain with almost 1,600 vertical feet. The trail system covers about 10 miles with over 1,000 feet in elevation change. The two main trails are rather strenuous with considerable elevation gain or loss, but there are others that provide a more relaxing walk through the park.