Challow Novices' Hurdle was opened to older horses from the 1981/82 season onwards. After a hiatus during the mid 1990s, juvenile hurdlers are now excluded from the race. The 1999–00 and 2005–06 runnings took place at Cheltenham. Challow Novices' Hurdle The Challow Novices' Hurdle is a Grade 1 National Hunt hurdle race in Great Britain which is open to horses aged four years or older. It is run at Newbury over a distance of about 2 miles and 4½ furlongs , and during its running there are ten hurdles to be jumped. The race is for novice hurdlers, and it is scheduled to
300 metres hurdles hurdle marks in the same place as the last seven hurdles of the standard 400-metre version, thus Masters only go over seven hurdles. While men of all ages have run over 300 hurdles, the youngest official division to use the distance is M60. M60 and M65 run over 30-inch (76.2 cm) barriers, M70 and M75 run over 27-inch barriers. Prior to 2010, older age divisions also did 300 hurdles, though the number of competitors was small. In 2010, M80+ and women's W70+ moved to doing a 200-metre race over the last five barriers of either race, thus retiring the 300