(Idaho)
Eagle Island State Park is a public recreation area on the southwest outskirts of the city of Eagle, Idaho. The state park covers 545 acres (221 ha) that are bordered by the north and south channels of the Boise River. The park's recreational facilities include swimming beach, picnic area, equestrian trails, and a water slide. (Ref: https://en.wikipedia.org/wiki/Eagle_Island_State_Park_(Idaho))