I did this last year. On the plus side there weren't many running, it was a good course with some nice scenery and was a friendly race. On the minus side there was a steepish hill close to the start and the small field encouraged me to go off quicker than I would usually. Quick start & hill meant that I found it tough for the rest of the race. Not sure this would be ideal for a 10 year old (unless they are good on inclines). Why not try Buscot Park 5k at 2.30pm July 2nd? Maybe a bit far from Hants though?
