You can get there Ok from Ramsbottom, 4/5 miles I’d guess. Go via Edenfield, bit of hill at the start but then downhill / flat for the rest of the way. Head for Bacup on the main A road that runs through Rossendale, watch out for Futures Park on your right towards Bacup. There are no signs for the Quarry from the road, go into the car park and take the lane from the back right up to the quarry.
There are map boards up and waymark arrows, not overly clear IMHO but they should get you around. When you get to the skills area, after the berms, take the trackway up towards the back of the quarry to continue on the red route. Beware the black is quite hard and the consequences of getting it wrong on the upper section could be quite nasty. In fac the whole quarry is at the upper end of the red / black grading scale. I would say the red is alot harder than the black at Llandegla for example.
If you’ve got pads wear them, it’s very rocky (it is a quarry after all). Have fun and stop and play in the skills area.