Forest Floor in Fall, Jersey County Pere Marquette State Park, Illinois 1600x1200
Pere Marquette State Park is an 8,050-acre (32 km²) protected area in southwestern Jersey County, Illinois, United States. It is located near the city of Grafton, Illinois, at the confluence of the Mississippi River and the Illinois River. The park is located on Illinois Route 100, which at this location is also part of both the Great River Road and the Meeting of the Great Rivers Scenic Byway. The park is operated and maintained by the Illinois Department of Natural Resources, and is Illinois\' largest state park in area. The park is also part of the Confluence Greenway and is at the northwestern end of the 21.5 mile Sam Vadalabene Bike Trail.
