Canadian explorer Pierre Gaultier de Varennes et de La Vérendrye reaches the western shore of Lake Michigan.

Pierre Gaultier de Varennes, sieur de La Vérendrye was a military officer, fur trader, and explorer. In the 1730s, he and his four sons explored the area west of Lake Superior and established trading posts there. They were part of a process that added Western Canada to the original New France territory that was centred along the Saint Lawrence basin.

Lake Michigan is one of the five Great Lakes of North America. It is the second-largest of the Great Lakes by volume and depth after Lake Superior and the third-largest by surface area, after Lake Superior and Lake Huron. To the east, its basin is conjoined with that of Lake Huron through the wide and deep Straits of Mackinac, giving it the same surface elevation as its eastern counterpart; hydrologically, the two bodies are a single lake that is, by area, the largest freshwater lake in the world.