Badlands National Park is a picturesque fingerprint of over 30 million years of geological evolution. The 380 square miles of protected grasslands – the largest in the United States – and the sensational natural amphitheaters are a must see when in western South Dakota. The best way to enjoy this unique experience is by driving on the Badlands Loop Road through the highlights of the North Unit. The 38 mile National Scenic Byway (SD 240) is reached by turning south off of Interstate 90 at either Exit 131 (for the NE Entrance) or Exit 110 at Wall (for the Pinnacles Entrance). You could make this spectacular drive in about one hour. No one does. You and your camera will stop at several of the 15 overlooks to photograph the incredible landscapes. So, reserve at least two to four hours. Badlands National Park is open 24 hours a day all year. Peak tourism season is during the summer.