Black Mesa State Park lies in Oklahoma's panhandle along the tri-state border with Colorado and New Mexico. The mesa takes its name from the layer of black lava rock that coated it about 30 million years ago. The adjoining nature preserve is operated by the Oklahoma Tourism and Recreation Department with the state park. It covers about 1,600 acres where visitors can hike and see 23 rare plants and eight rare animal species. The area marks where the Rocky Mountains meet the shortgrass prairie, and many species are at the eastern or western edge of their range. The park has campsites that can be reserved online.