South Dakota spending, because of the proximity of many tourist attractions in the Black Hills and Ellsworth Air Force Base. The next eight largest cities in the state, in order of descending 2010 population, are Aberdeen (26,091), Brookings (22,056), Watertown (21,482), Mitchell (15,254), Yankton (14,454), Pierre (13,646), Huron (12,592), and Vermillion (10,571). Pierre is the state capital, and Brookings and Vermillion are the locations of the state's two largest universities (South Dakota State University and University of South Dakota, respectively). With a population of about 14,000, Pierre is the second smallest state capital in the United States. Of the ten largest cities
South Dakota Highway 10 a curve to the south and then to the southeast, it reaches its eastern terminus at the Minnesota state line. Here, the roadway continues as Minnesota State Highway 28 (MN 28). SD 10 was formerly the "Glacier Trail". It was also formerly known as SD 12. The highway was redesignated in 1927, presumably to avoid confusion with nearby US 12. The segment of the highway west of US 83 was added in the early 1960s. South Dakota Highway 10 South Dakota Highway 10 (SD 10) is a state highway in the north-central and northeastern portions of the U.S. state of