This 1,400-acre state park, named for the Thomas Jefferson Stone family, is located on the western border of Iowa in the Plymouth and Woodbury counties. The rugged topography and panoramic views attract 200,000 people annually. The park is open year-round from 4 am-10:30 pm. The park roads are closed during the winter season. Cabins, camping, and lodge rental information available on the Park’s website.