Eagle Island State Park is a 545 acre day-use park west of Boise that features a popular swimming beach, a grassy picnic area, a waterslide and more than five miles of trails for those looking for a place to ride horses, hike, walk your dog, or play disc golf. The park also has a zip line course which consists of six zip lines and features one of the state’s first quick jumps, which is a parachute simulated leap off of a 60-foot tower.