Interstate 90 is only one of the paths through South Dakota. Still, it has much more to offer than we were able to experience. Other places to explore along this route are numerous parks and recreational areas, historic restorations, Scenic Byways, and national grasslands. Spearfish and Deadwood deserve mention as towns to visit along the corridor.
Take the time to look around, especially in the southwest corner of the state around the Black Hills. Even in the midst of thousands of motorcycles, the area was peaceful.