It’s been a while since I’ve been. There are the standard FC trails from High Lodge, however, if you are visiting by car it’s cheaper by a long margin to park at the Brandon country park car park (it has a cafe and loo too) then either seek out the cheeky (aim for the Mayday twichers hut and take a left after you have passed it if I recall correctly) or head across the road back to the waymarked stuff.
It’s fun for a spin and by that I mean there is no downhill so you will almost always be pedalling, it drains quite well although some areas under the trees remain quite boggy and it can be sandy in places too. It’s not the sort of place you’d rave about to your mates though.