Turnhole Bend Hiking Trail is a roughly 0.8-mile out-and-back foot trail in Mammoth Cave National Park, Kentucky. Difficulty: easy, from Trailbound's popular-hike list. That is the full hike: the mapped trail line covers only 0.53 mi of it, so don't plan from the map line alone.
Open Turnhole Bend Hiking Trail on Trailbound's interactive map to see the full route, the elevation profile, today's forecast and any park alerts for Mammoth Cave. Mammoth Cave has permits or reservations for some areas: see the Mammoth Cave page for what's needed.