Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. South Dakota Highway 28 is a state route located in east central South Dakota. It begins at U.S. Highway 281 west of Hitchcock, and runs easterly to the Minnesota border east of Astoria, becoming Minnesota State Highway 271. It is 109 miles (185 kilometers) in length. South Dakota 28 was first designated around 1934. It absorbed the old route of South Dakota Highway 26, and was extended eastward to U.S. Highway 77 near Estelline. Around 1950, the extension to the Minnesota border was completed. The westward extension to U.S. 281 was made around 1954. SD 28 may have also eventually extended further west to South Dakota Highway 45, but the current terminus was in place by 1970.