Home Events & Festivals The 3 Dune Challenge Twitter Facebook Print About The 3 Dune ChallengeAre you looking for a new challenge? Do you have what it takes to climb the three highest sand dunes in Indiana? If so, take The 3 Dune Challenge, an initiative spearheaded by Indiana Dunes Tourism in 2014. To complete The 3 Dune Challenge, you must hike a special 1.5 mile course at Indiana Dunes State Park, climbing Mount Jackson (elevation 176 feet), Mount Holden (184 feet), and Mount Tom (192 feet). Some parts of the trail feature 40-degree slopes, making each step that much more, well, challenging. In the sandy vertical climbs, it’s common to take two steps forward and slide one step back. But if you conquer The 3 Dune Challenge, you're invited to stop by the Indiana Dunes Visitor Center, located just a mile south of the state park, to buy a shirt and pick up a free commemorative sticker or decal and postcards. The 3 Dune Challenge's official kickoff date: June 12, 2014.