It looks like you're new here. If you want to get involved, click one of these buttons!
All of the bhf 'races' I've done are really more like challenges - mildly organised, some water provided, no official results - but ultimately a great fund raiser. If you do them for the 'right' reason they are excellent.
I suppose this one could be different though, but look up the Blenheim Palace half ratings for an idea of whats provided.