While
Hernando de Soto was the first European to make an official note of the Mississippi River by discovering its southern entrance in 1541, Jolliet and Marquette were the first to locate its upper reaches and travel most of its length, about 130 years later. De Soto had named the river Rio del Espiritu Santo, but tribes along its length called it variations of "Mississippi," meaning "Great River" in the
Algonquian languages. On May 17, 1673, Jolliet and Marquette departed from
St. Ignace, Michigan, with two canoes and five other
voyageurs of French-Indian ancestry. The group sailed to
Green Bay. They paddled upstream (southward) on the
Fox River to the site now known as
Portage, Wisconsin. There, they
portaged a distance of slightly less than two miles through marsh and oak forest to the
Wisconsin River. Europeans eventually built a trading post at that shortest convenient portage between the Great Lakes and Mississippi River basins. On June 17, the canoeists ventured onto the Mississippi River near present-day
Prairie du Chien, Wisconsin. The Jolliet-Marquette expedition paddled along the west bank of the Mississippi until mid-July. When they passed the mouth of the
Arkansas River, they became satisfied that they had established that the Mississippi flowed into the Gulf of Mexico. By this point, they had encountered natives carrying European goods and worried about a possible hostile encounter with explorers or colonists from Spain. The voyageurs followed the Mississippi back to the mouth of the
Illinois River, which friendly natives told them was a shorter route back to the Great Lakes. Following the Illinois river upstream, they turned up its tributary, the
Des Plaines River near modern-day
Joliet, Illinois. They continued up the Des Plaines River and portaged their canoes and gear at the
Chicago Portage. They followed the
Chicago River downstream until they reached Lake Michigan near modern-day
Chicago. Father Marquette stayed at the mission of St. Francis Xavier at the southern end of Green Bay, which they reached in August. Jolliet returned to Quebec to relate the news of their discoveries. On his way through the
Lachine Rapids, Jolliet's canoe overturned, and his records were lost. His brief narrative, written from memory, is in essential agreement with Marquette's, the chief account of the journey. ==Later years==