Three lobes of the Laurentide ice sheet shaped the landscape of Langlade County during the Pleistocene ice age. Left behind was a large terminal moraine, 250 feet high in places, as the continental glacier began to retreat 13,000 to 25,000 years ago. South and west of the terminal moraine is the broad outwash plain known as the Antigo Flats. This and much more is what can be found along the Ice Age Trail.