1. On October 23, 1879, the town of Deadwood burned in what became known as the "Great Fire of Deadwood." The fire destroyed over 300 buildings and caused over $1 million in damage.

2. On October 23, 1919, the South Dakota State Capitol building in Pierre was dedicated. The building was designed by architect Bertram Goodhue and is a prominent landmark in the state's capital city.

3. On October 23, 1956, South Dakota native and Olympic gold medalist Billy Mills set a new world record in the 10,000-meter run at the United States Track and Field Championships.

4. On October 23, 1993, the city of Rapid City celebrated the opening of the rushmore Plaza Civic Center. The venue has since hosted a variety of concerts, sporting events, and conventions.

5. On October 23, 2013, the Sioux Falls Skyforce, a professional basketball team based in Sioux Falls, won their first game of the season against the Canton Charge. The Skyforce went on to win their third championship later that season.