Time in South Dakota the zone.tab. Time in South Dakota South Dakota lies in both the Mountain Time Zone and the Central Time Zone. Mountain Time roughly contains the western half of the state, but not all of it. Rapid City is the largest city in the Mountain Time portion of the state. Central Time contains the eastern half of the state and roughly more of the state than the Mountain Time Zone and includes the state capital Pierre and the largest city, Sioux Falls. The 2 zones for South Dakota as given by zone.tab of the IANA time zone database. Columns marked *
South Dakota Highway 25 South Dakota Highway 25 South Dakota Highway 25 (SD 25) is a state highway in the eastern part of the U.S. state of South Dakota. It connects Scotland, Howard, De Smet, and Webster. It consists of two disconnected segments. Its shorter southern segment extends from SD 50 northwest of Tabor to U.S. Route 18 (US 18) west of Olivet. Its much-longer northern segment extends from SD 262 northwest of Emery, through Howard, De Smet, and Webster, to the North Dakota state line. Here, the roadway continues as North Dakota Highway 18 (ND 18). SD 25's northern segment was established in