The Kings Bluff Loop Trail is a 1.8-mile trail in the Pedestal Rocks Scenic Area (Ozark National Forest, northern Pope County). The elevation change on the trail is only about 350 feet. It is a pretty easy hike. There is parking and a vault toilet there at the scenic area. It is on highway 16, a few miles east of the intersection (at Pelsor) of Highway 7 and Highway 123.
Of course, the highlight of the trail is Kings Bluff Falls. At 114 feet, Kings Bluff Falls is one of the tallest waterfalls in Arkansas. It is beautiful. Like many waterfalls in Arkansas, your best chances to see it in action are probably during leaf-off months and after a recent rain.