We skiied Boro last April and the snow was fairly thin on the lower slopes but it's difficult to say. We know a local hiking guide in Boro who arranges various walks of varying difficulties - the hardest is to the 7 Lakes. Never done it but it looks fabulous. If we can help further give us shout at info@skibg.net
Better to take some waterresistent boots and trousers with you for the up you need only a shirt for the down a light sweater. Enough hiking paths are walked in the winter to. Snowless hiking in Borovez not before late april or may.