The main feature of the park is various scenic trails overlooking
Fourteen Mile Creek, noted for being one of the oldest unglaciated stream valleys in the state. On the peninsula the creek forms where it meets the Ohio River stands an isolated bedrock ridge called the
Devil's Backbone. According to legend, the Devil's Backbone forms part of the remains of an ancient stone fortress built by Welsh adventurers who traveled to the Ohio Valley in the 12th century, though the story is unsubstantiated. The Backbone is restricted, however park staff offer limited tours in the winter. Over 14 miles of hiking trails are available for use, with many great views of the Ohio River, Fourteen Mile Creek and more. Charlestown State Park has a 192 site campground, including "Full Hook up" campsites.
Devonian fossils and
karst sinkholes can be found in the park, in addition to 72 species of birds, including
bluebirds, black
vultures and
bald eagles. The park was scheduled for $3 million in improvements, which were delayed in January 2006 when workers building a new boat ramp found a
Native American cooking area dating back to 2,000 B.C. The remains of firepits and stone slabs that would be used to crack nuts were found, as well as Laurel chert, from which stone tools were made. Only once the archaeological surveys were done could work on the improvements, including a five-lane boat ramp and a riverfront walking trail, continue. In September, 2006 construction of the new boat ramps restarted. The boat ramp opened in June 2007. In September 2011, the historic Portersville Bridge was relocated and reconstructed to cross the creek and connect Rose Island for the first time. Park Staff offer regular guided tours of Rose Island. ==Future plans==