Carlyle Lake is the largest man-made lake in Illinois, covering approximately 26,000 acres. Located in Clinton County, it was created in the 1960s for flood control, recreation, and water supply. The lake is a popular destination for fishing, boating, and camping, attracting visitors from nearby areas. The lake is surrounded by Carlyle Lake State Fish and Wildlife Area, which offers various outdoor activities, including hiking and birdwatching. Additionally, the Carlyle Lake Dam plays a crucial role in managing water levels and preventing flooding in the region. The area is known for its scenic beauty and diverse wildlife.