County Line Estates Park is located in Barrington Hills, Illinois, and offers visitors a variety of activities to enjoy throughout the year. Some good reasons to visit the park include hiking, fishing, picnicking, and bird-watching. There are also playgrounds and sports fields for children and adults to use.

One of the unique features of County Line Estates Park is the scenic Fox River that runs through it. Visitors can fish for smallmouth and largemouth bass, northern pike, walleye, and catfish. The park also has a boat launch that provides access to the river for boating and kayaking.

There are several trails in the park that offer scenic views of the river and the surrounding forest. The trails range in difficulty, making them suitable for both experienced hikers and beginners. Visitors can also enjoy the park's picnic areas, which include grills and tables for outdoor meals.

Interesting facts about the park include its history as the site of a Native American village and the presence of oak savannas that are home to a variety of wildlife, including white-tailed deer and wild turkeys.

The best time of year to visit County Line Estates Park is during the spring and fall when the weather is mild and the leaves are changing colors. However, the park is open year-round, and visitors can enjoy activities such as ice fishing and cross-country skiing during the winter months.