At 123 feet, Mount Baldy is one of the tallest dunes on the southern shore of Lake Michigan and one of the most remarkable geological features in the national park. Unlike the forested dunes nearer to Porter, Baldy is largely bare — the vegetation that once stabilised it was stripped away by decades of heavy visitor use, and the dune has been migrating inland ever since. The summit offers views across the lake and back over the surrounding wooded landscape.
Access to Mount Baldy requires joining a ranger-led tour, which depart from the parking area and take about 90 minutes. The tours run on weekends and some weekdays between Memorial Day and Labor Day. Check the park's website for the current schedule and to book, as tours fill quickly. The parking area itself has a pleasant short trail along the base of the dune, suitable for all abilities.