Warren Island State Park Town: Islesboro Address: Warren Island, Lincolnville, ME 04849 Phone: Tel: 207-941-4014 Website: http://www.maine.gov/doc/parks/ Open: MD-15-Sep Sites: 10 Facilities: tenting, other swimming, boating, fishing Region: Midcoast For reservations please call 1-800-332-1501 in State and 207-624-9950 out of state.