We struggled to find the trails when we last went – riding north from Rivi, we'd only ever been to healey nab once before and got lost having gone in the gate on the eastern edge of the woods, so we followed the same route and found nothing. Having turned back we decided to push through the woods and eventually bumped into a couple of council chaps out working on a saturday who showed us the trail head – here
http://lyxus.net/fheh
As the map shows, we should have turned west at the junction and gone in the gate to the southern boundary of the woods.
The track when we went was still under construction, and given the weather since then I can't see that a great deal will have changed, but what was there was great fun – definitely worth calling in if you;re riding round that way. The red and black trails are interwoven so you do need to be careful if there are lots of people on both trails, but TBH when we went we were the only riders there
as for the other trails, the plan longer term is to build a trail over the moors linking healey nab to the pennine bridleway, and thence to the trails at lee quarry and the new trails planned up on the top of rooley moor