Elmin Pits will take you direct to Hope Cross, although the last couple of times I’ve used it, it was getting pretty claggy in the middle so possibly worth avoiding until it dries out.
SBC takes you a good chunk above Hope Cross, but is basically weatherproof.
Or if you like a tech climbing challenge, the Beast is tantalisingly close to being climbable – I’d imagine an ebike would p!ss up it (but would be cheating).
Anyone who says they have ridden Parkin Clough is probably talking out of their backside.
I’ve cleaned it top to bottom a total of 4 times (and a 5th where I ended up upside down in the stream a long way below the trail). That was on 26″ wheels – I’ve not tried it all on my current big bike, although I do the top and bottom sections fairly often. Its not “fun” unless you adore scary tech riding, but it does give you a testpiece of where your riding skills are at that point in time. The kind of thing to do once or twice a year.
The caveat to that is you need A) to do it midweek AND out of hours when it’s deserted – as control in places is borderline and “just stopping” to avoid other users is not going to happen B) you need to do it when it is ABSOLUTELY bone dry – you need absolute precision placement on the roots and rocks, and that just won’t happen if there’s any moisture around.