Chicago Portage National Historic Site

The Chicago Portage National Historic Site is a National Historic Site commemorating the importance of the Chicago Portage in Lyons, Cook County, Illinois, United States. It is located in Chicago Portage Forest Preserve and the Ottawa Trail Woods Forest Preserve, at the junction of Portage Creek with the Des Plaines River, on the west side of Harlem Avenue on the line of 48th Street. Preserved within the park is the western end of the historic portage linking the Chicago River to the Des Plaines River, thereby linking the Great Lakes to the Mississippi River. A memorial depicting the portage of French explorers is located at the parking area. A trail leads from the memorial down into the portage wilderness area.

The site commemorates the Chicago Portage, first written about by French explorers Father Marquette and Louis Joliet during their use of the portage and exploration of the area between Lake Michigan and the Mississippi River.