Hannen Park is a popular destination in the state of Iowa for those looking to enjoy the great outdoors. The park encompasses 146 acres and features a variety of recreational activities, including fishing, hiking, biking, and picnicking. Visitors can enjoy the park's beautiful lake, which is stocked with fish and has a beach area for swimming and sunbathing. There are also several playgrounds, picnic areas, and walking trails throughout the park.

Some specific points of interest in Hannen Park include the historic stone lodge, which was built in the 1930s and is available for rental for events and gatherings. The park also features a disc golf course and a BMX track, which are popular with visitors of all ages. Interesting facts about the area include the park's role in the construction of the Des Moines River levee system, as well as its designation as an Iowa Bird Conservation Area due to the presence of several rare bird species in the park.

The best time of year to visit Hannen Park depends on the visitor's interests and activities. Spring and fall are popular times for hiking and birdwatching, while summer is ideal for swimming and boating in the lake. However, the park is open year-round and offers a variety of winter activities, such as ice fishing and cross-country skiing. Overall, Hannen Park is a great destination for anyone looking to enjoy the natural beauty of Iowa and engage in outdoor activities.