Hollins Cross to Greenlands
Better to do Hollins to Backtor Bridge.
Not necessarily fail on tough ones. Just go sensibly. According to your skills and bike capability.
I managed once Potato Alley on gravel, drop bar bike with 32c tyres. It was very measured and steady rather than quick downhill, but done nevertheless…
Allow yourself loads of time, remember to hydrate and eat, don’t get OTT and you will be fine.
Just last Tuesday I’ve done 65miler (100km) around Peaks on my hardtail. (Stanage Edge, Cutthroat Bridge, Whinstone Lee Tor, Hagg Farm, Hope Cross, Potato Alley, Lockerbrook Farm and Cut Gate. Doable if you put your mind into that properly.
Cheers!
I.