Before the clever clogs crew jumped all over it, I think this is the sort of thing franki was referring to – a set of routes on BWs and roads specifically promoted for MTBers and signposted on the ground:

Mountain Biking in the Beautiful Brecon Beacons

However in practice when I’ve ridden these routes signage has been very patchy and a fair bit of navigation was required. Same on foreign tracks with dots painted on rocks – grumpy locals tend to scrub them out and it’s easy to miss one.

Aren’t they in woods so that real MTBers don’t gain any advantage over tri-athletes at 24 hour Events?