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 48 South Dakota Highway 48 South Dakota Highway 48 (SD 48) is a short state route in the far southeast corner of the U.S. state of South Dakota. The route, which runs entirely through Union County, begins at Interstate 29 about west of Spink, and becomes Big Sioux River Road, formerly Iowa Highway 403, northwest of Akron, Iowa. It is in length. SD 48 begins at I-29 exit 31, approximately south of Sioux Falls. From this diamond interchange, SD 48 travels due east. It near immediately meets County Road 1C, an old alignment of US 77. Two miles east of the