Riley Moore Falls is a must see near Walhalla, SC. The trail is drivable to a certain point, then you need a 4W drive for the remainder of the trail to the hiking path. Nothing too crazy, and most people just parked their cars and walked this portion. Maybe half a mile further.
Once you enter the trailhead, it's a brief 1 mile trail in to the pretty water fall and swimming hole. Nice beach area as well. Great spot for littles as well.