Big Hollow Trail South Loop is a 2.49-mile loop foot trail in Mammoth Cave National Park, Kentucky. It climbs 95 ft to a high point of 809 ft. Difficulty: easy, from the NPS hiking-rating formula.

Open Big Hollow Trail South Loop 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.