Family Fun at Eagle Island State Park. Eagle Island State Park, nestled just 3 miles west of Eagle, ID, 7 miles north of Meridian, ID, 8 miles west of Boise, ID, and 18 miles east of Caldwell, ID. The park offers a plethora of amenities and activities for the whole family. Spread across 545 acres at an elevation of 2,524 feet, Also, the park boasts an air co[...]