I asked for the link to be taken down last night.
GeoffJ originally wrote> Presumably you have FC's consent to run races on their land?
You have to apply for consent for each event. When we "borrowed" the course for SSWC we ran into opposition from FCS, it was only with help of locals that we eventually got permission.
Trails built as race courses often aren't built to cope with big numbers, year round. I can think of a number of "low key" trails that have been ruined by overuse after being shared on the internet. I can also think of at least one race course that a club can't use for events after people turned up in numbers, behaved irresponsibly and pissed the landowner off.
If visitors have to ask locally (bike shops or other locals) then they might be asked not to ride if it isn't in condition or needs work.
To address your edit: not the reason for it not being a good idea to publish details of a race course on a public forum.