The premier family waterpark of Sioux Falls. As the largest waterpark in the state, Wild Water West is the best summer entertainment in South Dakota! We’ve been in the business of providing safe, family fun for more than 25 years. Thousands visit every year, traveling from near and far. With water and land attractions for the young and the young at heart, everyone can get their fill of thrills. We’re open Memorial Day weekend (late May) through Labor Day (early September).