I'm sorry, but Ben Geren Park is not located in the state of Iowa. Ben Geren Park is actually located in Sebastian County, Arkansas. It is a popular destination for tourists and locals due to its wide range of recreational activities, including camping, fishing, hiking, and golfing. Some specific points of interest within the park include the Janet Huckabee Arkansas River Valley Nature Center, a disc golf course, and an aquatic center. Ben Geren Park is also home to several historical landmarks, such as the Fort Smith National Historic Site and the Judge Parker Historic District. The best time of year to visit the park is during the spring or fall when the weather is mild and comfortable.