I'm looking to ride down some big mountains in the Brecon, can be in the vicinity for 3/4 days so if anyone has any ideas of which mountains around there are "must do's", alternatively any routes which have been shared anywhere would be ideal. Will be taking the AM bike so ups, downs, nice scenery and technical stuff is good. Also close(ish) 20miles? to accommodation - B&B etc. Not looking for trail centres tbh.