Might take a little wander up to Dock Tarn at the weekend to see what it would be like, I have been up there many years ago (just walking) I have a feeling it was pretty wet and boggy.
Frith Wood section is just a little rockier on the bottom section, darned good fun but it does extend the road ride a little. Nowt wrong with the other route that goes into Rosthwaite though it’s still good.
I’ve done a cheeky route coming down from Dale Head, it’s pretty technical and steep from what I remember, we ended up coming onto the bridleway just above the Castle Crag descent so we didn’t go passed Hollows Farm.