Petit Jean State Park is the oldest state park in Arkansas. It is located in the central northern part of the state, in western Conway County, atop Petit Jean Mountain, a ridge between the Ozark and Ouachita Mountains. One of the features the park is noted for is prehistoric rock art, some of which is accessible to park visitors via its hiking trails. A total of twelve such sites have been listed on the National Register of Historic Places for their importance. Most of the rock art has been dated to about 1500 CE, and is not obviously associated with habitation sites or other sites bearing evidence of other Native American activities.