McLain State Park is a 800-acre state park located in the state of Illinois. The park offers a variety of recreational opportunities including hiking, fishing, camping, and swimming. The park's centerpiece is a 22-acre lake which provides visitors with plenty of opportunities for water-based activities.

One of the main reasons to visit McLain State Park is to enjoy the park's natural beauty. The park offers visitors a chance to explore a variety of ecosystems, including hardwood forests, prairies, and wetlands. Additionally, the park is home to a variety of wildlife including deer, turkey, and waterfowl.

Some of the specific points of interest to see at McLain State Park include the park's numerous hiking trails which offer visitors the chance to explore the park's diverse landscapes. The park's beach area is also a popular destination, offering visitors a chance to swim, sunbathe, and relax. The park also has a campground with both primitive and electric campsites, making it a popular destination for overnight stays.

In terms of interesting facts about the area, McLain State Park was named in honor of James R. McLain, a former Illinois State Representative who was instrumental in the creation of the park. Additionally, the lake at the center of the park was created by damming a tributary of the Vermilion River.

The best time of year to visit McLain State Park depends on what activities you are interested in. The park is open year-round, but the most popular time to visit is during the summer months when temperatures are warmest and the lake is at its most inviting. Fall is also a popular time to visit, as visitors can enjoy the park's beautiful fall foliage.