Explorer Jacque Marquette
The Explorer of the Mississippi.
When did he explore
On May 17, 1673 he explored the Mississippi. Marquette's group traveled westward to Green Bay in present-day Wisconsin, ascended the Fox River to a portage that crossed to the Wisconsin River and entered the Mississippi near Prairie du Chien on June 17, 1673. In 1674, he set out to found a mission among the Illinois Indians.