Porcupine Mountains Wilderness State Park is not located in Illinois, but in Michigan's Upper Peninsula.

Porcupine Mountains Wilderness State Park is a popular destination for outdoor enthusiasts. The park is home to miles of hiking trails, several lakes, and beautiful waterfalls. The park is also known for its stunning fall foliage and vibrant wildlife.

One of the main attractions in the park is the Lake of the Clouds, which offers stunning panoramic views of the surrounding mountains and forests. Other points of interest include the Summit Peak Observation Tower, the Presque Isle River Waterfalls, and the Porcupine Mountains Ski Area.

Interesting facts about the park include that it is Michigan's largest state park, covering over 60,000 acres. The park is also home to one of the largest old-growth forests in the Midwest, with trees dating back over 300 years.

The best time of year to visit the park depends on personal preference. Summer offers warm weather and opportunities for swimming and fishing, while fall is known for its vibrant foliage. Winter brings snow and the opportunity for skiing and snowshoeing, and spring is a great time for hiking and spotting wildlife.