Chain O' Lakes is a popular recreational area located in northeastern Illinois, known for its interconnected system of lakes. This region features over 7,000 acres of water, making it ideal for boating, fishing, and swimming. The lakes are surrounded by parks and natural areas, providing opportunities for hiking and wildlife observation. The Chain O' Lakes is part of the Fox River watershed and includes several notable lakes, such as Catherine Lake and Grass Lake. The area attracts visitors year-round, with activities ranging from summer water sports to winter ice fishing. It is a vital habitat for various species of birds and fish.