Life Magazine once proclaimed Sioux Falls, South Dakota as the “healthiest city in the United States.” A spread-out community of 200,000 people, it lies midway between Minneapolis, MN and Rapid City, S.D. We stopped there for a day in August of 2017 on our way to Mount Rushmore. Sioux Falls lies between two Interstates: I-90 and I-29. One can…