Trail Biking Wales

Does anyone know a good route…?
Does anyone know a good Mountain Biking/Cross Country bike trail in Cardiff, Wales?
Preferably in Cardiff, but just outside would be greatful aswell.
Thanks
cwm carn is probably the closest to Cardiff.
Afan forest is a little to the south and Brecon Beacons are to the north.
You could also try Bristol.
Trail biking wales