sentences:  This special one mile (1.6 km) run allowed children and their families to enjoy running part of the course during the main race and gave the race a carnival atmosphere.The 2009 Cardiff Half Marathon took place on Sunday 18 October 2009 and was started by sprinter Jamie Baulch.Just over 11,000 runners signed up to participate in the race, with an estimated 18,000 spectators also coming to Cardiff to offer support.