300 metres hurdles to beginning of a standard 400 meter hurdle race, but its placement on the track is shifted 100 meters around the track so it finishes at the common finish line on the straightaway, where the longer race would reach the same point near the end of the second turn. There are 8 hurdles in the high school version, the last hurdle just 10 meters before the finish line. High schools began adopting the longer hurdle event state by state starting in the 1960s. At the time, most which school competition was using United States customary units, so the race was
2017 World Championships in Athletics – Women's 100 metres hurdles 2017 World Championships in Athletics – Women's 100 metres hurdles The women's 100 metres hurdles at the 2017 World Championships in Athletics was held at the London Olympic Stadium on . World record holder Kendra Harrison (USA) was the slowest time qualifier to the final, while 2011 champion Sally Pearson (AUS), Dawn Harper-Nelson (USA) and Pamela Dutkiewicz (GER) were the top three fastest. It was Harper-Nelson's fifth straight championship and fourth final. In the final, Harrison was out slightly faster than Pearson, Christina Manning (USA) and heptathlete Nadine Visser over the first hurdle. Harrison held the lead until she rattled