<P> Other distances are run, particularly indoors but occasionally outdoors . The sprint hurdle race indoors is usually 60 meters for both men and women, although races 55 meters or 50 meters long are sometimes run, especially in the United States . A 60 - meter indoor race is run over 5 hurdles . A shorter race may occasionally have only 4 hurdles . Outdoors, a long hurdle race is sometimes shortened to 300 meters for younger participants, who run over 8 hurdles . For example, high school and middle school athletes in California and Pennsylvania run the 300 meter hurdles instead of running the 400 meter hurdles, like what the majority of state competitors run today . These hurdles are spaced distance-wise identical to the beginning of a standard 400 meter race which would have 10 hurdles . There are also 200 meter races for middle school and younger divisions over 5 hurdles (spaced in the same position as the last 5 hurdles of a standard 400 meter race). </P> <P> There are five hurdle heights on most standard hurdles . The highest position (sometimes "college high" or "open high") is used for men's sprint hurdle races (60 m, and 110 m), which are 42 inches (106.7 cm). The next highest, (sometimes "high school high") 39 inches (99.1 cm) is used by veteran men under age 50, and younger boys . The middle position of 36 inches (91.44 cm), (sometimes "intermediate") which is used for men's long hurdle races (400 m) plus some youth and veteran age divisions . The next lower position, 33 inches (83.8 cm) is called the "women's high" used for women's short hurdle races . The lowest position, called the "low hurdle" 30 inches (76.2 cm) is used for women's long hurdles plus many youth and veteran races . Some races call for 27 inches or 68.6 centimetres for youth or veteran events . Hurdles that go to this position are rare and are notable by having a sixth position . </P> <P> In sprint hurdle races for men, regardless of the length of the race, the first hurdle is 13.72 m (45 ft) from the starting line and the distance between hurdles is 9.14 m (30 ft). In sprint hurdle races for women, the first hurdle is 13 m (42 ft 8 in) from the starting line and the distance between hurdles is 8.5 m (27 ft 11 in). In long hurdle events, whether for men or women, the first hurdle is 45 m (147 ft 8 in) from the starting line and the distance between hurdles is 35 m (114 ft 10 in). Most races which are shorter than the standard distance (such as indoor races) are simply run over fewer hurdles but use the same distances from the starting line . There are variations on hurdle height and spacing for the age groups of athletes competing . See Masters athletics (track and field) and Youth athletics . </P> <Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2012) (Learn how and when to remove this template message) </Td> </Tr> </Table>

What is the distance between hurdles in 100m
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