Main Trail South is a 4.14-mile out-and-back foot trail in Glacier Bay National Park & Preserve, Alaska. It is essentially flat, with a high point of 35 ft. Difficulty: easy, from the NPS hiking-rating formula.
Open Main Trail South on Trailbound's interactive map to see the full route, the elevation profile, today's forecast and any park alerts for Glacier Bay. Glacier Bay has permits or reservations for some areas: see the Glacier Bay page for what's needed.