Great Lakes Circle Tour Great Lakes Circle Tour The Great Lakes Circle Tour is a designated scenic road system connecting all of the Great Lakes and the St. Lawrence River. It consists of routes for circumnavigating the lakes, either individually or collectively. In Michigan, the Lake Superior Circle Tour (LSCT) runs from the state line at Ironwood to Sault Ste. Marie. In between it follows U.S. Highway 2 (US 2) to Wakefield, M-28 to Bergland and M-64 to Ontonagon. At Ontonagon, the LSCT continues east along M-38 to M-26. It follows M-26 to Houghton and then follows US 41 north to Copper Harbor. There
Great Lakes for Lakes Ontario and Erie were created, along with what would become the Saint Lawrence River. The Great Lakes are estimated to have been formed at the end of the last glacial period (the Wisconsin glaciation ended 10,000 to 12,000 years ago), when the Laurentide Ice Sheet receded. The retreat of the ice sheet left behind a large amount of meltwater (see Lake Algonquin, Lake Chicago, Glacial Lake Iroquois, and Champlain Sea) that filled up the basins that the glaciers had carved, thus creating the Great Lakes as we know them today. Because of the uneven nature of glacier erosion,