From prehistoric discoveries to billion-year-old rocks and unexpected outdoor adventures, there’s more to South Dakota than meets the eye. Swipe to see how many you already knew. → #HiFromSD Landlocked? Yes. Short on shoreline? Apparently not. A big reason is Lake Oahe, a 231-mile-long reservoir along the Missouri River, alongside the state’s many other lakes, reservoirs and tributaries. Every August, hundreds of thousands of riders descend on the small Black Hills town of Sturgis. First held in 1938, the rally brings a week of rides, races, music and events. More than 1,500 bison roam custerstateparksd’s 71,000 acres. Drive the 18-mile Wildlife Loop for a chance to spot them alongside pronghorn, elk and other wildlife. Palisades State Park’s pink and red Sioux Quartzite is around 2 billion years old. Its dramatic cliffs rise up to 50 feet above Split Rock Creek and are also popular with climbers. Fossils reveal that ancient three-toed horses, saber-toothed cats and rhino-like m...