Just now Caroline Robinson,South Westand John Danks,South West BBC Suzi Cumberland, Managing Director, said there were more than 10,000 participants A record-breaking field of about 10,000 people took part in the Plymouth Half Marathon, 10k or Schools Challenge races, organisers said. The 13.1 mile (21km) half marathon route started and finished on Plymouth Hoe on Sunday, with people raising money for various causes.