The 100-yard dash is a track and field sprint event of 100 yards. It was part of the Commonwealth Games until 1970, and was included in the triathlon of the Olympics in 1904. It is not generally used in international events, replaced by the 100-metre sprint (109.36 yards). However, it is still occasionally run in the United States in certain competitions; in the NCAA championships it was last run in 1975. Walter Halben Butler (1852–1931) is credited with being the first to run the race in 10 seconds.