I was up at Nant today with the kids to see Santa and i spoke to the lady in the shop about the trails. The trails are open apart from High as a Kite (have to use the fire road along side instead).

Most of the trees have been felled and it looks completely different now 🙁 took some pics but having trouble uploading them.

http://www.mbwales.com/en/content/cms/centres/nant_yr_arian/nant_yr_arian.aspx

I love riding there. The man made trails are good but getting into the wild on the Syfydrin trail takes some beating.