| Horseshoe Lake State Park | |
| Iucn Category: | III |
| Map: | Illinois#USA |
| Map Width: | 225 |
| Location: | Madison County, Illinois, USA |
| Nearest City: | Granite City, Illinois |
| Coordinates: | 38.6856°N -90.0942°W |
| Area: | 2960acres |
| Governing Body: | Illinois Department of Natural Resources |
Horseshoe Lake State Park is an Illinois state park in Madison County, Illinois, United States. It is approximately 2960acres and surrounds a large horseshoe-shaped lake called Horseshoe Lake. Horseshoe Lake is the second largest natural lake in Illinois taking up approximately 2400acres of the 2960acres park. The park has connections to Madison County Transit's Schoolhouse Trail, which connects to over 85miles of bike trail in Madison County, and even a trail which goes all of the way to downtown St. Louis after crossing the Mississippi River on the Chain of Rocks Bridge. The park is located in southeastern Granite City, Illinois, 10miles northeast of downtown St. Louis.