From the end of middle moor (mile 2.5) to mile 9, to be frank the only “good” bit is gird lane as per my post above. I wouldn’t do that exact route myself especially if starting from Marple, I’d do something like a cross between these two
http://www.mapmyride.com/gb/marple-eng/marple-pootle-route-23654800
http://www.mapmyride.com/sc/victoria-english-river/stw-northern-meet-marple-ride-route-11537800
but still not exactly either of those. Out of marple up to Mellor Hall, loop up Smithy lane and down gird lane and back to Mellor hall, through to Gun road and over to ZIg and Zag, through to Aspenshaw hall, optional extenstion via barking dogs farm to PBW into hayfield, twentytrees and middle moor, left at the end towards little hayfield then right up to Blackshawhead, cut through to the Last Drop to Rowarth then back to Marple for Tea and Cake. Or Beer.
edit – I’ll map that out later