The Jacob's Ladder bridleway is mostly rocky so very little mud. Ditto the rocky trough off the end of Rushup though the continuation along Rushup Edge itself is always messy, though not on the footpath side, though of course you wouldn't do that, er, would you… and, to be honest, the Roych Clough track isn't bad.
There was a lot of rain at the weekend, rode stuff like Middle Moor when it was effectively a stream and it looked like stuff like Coldwell Clough was taking a real hammering from the sheer volume of water. I'd have said Roman Road normally, but while the descents at either end are fine, being largely rock, there's quite a lot of standing water up there at the moment and it seems to be a major pad destruction zone…