I'm sorry, but there seems to be a mistake. Mill Bluff State Park is actually located in the state of Wisconsin, not Missouri. Here is a summary about Mill Bluff State Park in Wisconsin:

Mill Bluff State Park is a beautiful natural area located in western Wisconsin. There are several good reasons to visit, including hiking, wildlife viewing, and camping. The park features several interesting points of interest, including the Mill Bluff Towers, which are ancient rock formations that rise above the surrounding landscape. Visitors can also explore the nearby Castle Mound archaeological site, which contains evidence of prehistoric human habitation.

Other interesting facts about the area include the fact that the park is home to a variety of wildlife, including black bears, deer, and coyotes. Additionally, the park is part of the Ice Age National Scientific Reserve, which contains evidence of the last Ice Age and the glaciers that shaped the landscape.

The best time of year to visit Mill Bluff State Park is during the spring or fall, when the weather is mild and there are fewer crowds. However, the park is open year-round, and offers a variety of outdoor activities throughout the year.