Cragg Vale. Longest continuous gradient in the country. A beast to climb, but heaven to descend. Not as brake-grippingly steep as its partner Blackstone Edge.
I like the descent from Moscar Top back into Sheffield.
Cragg Vale is a dissappointment from both directions. Blackstone Edge is much nicer, the descent is good, suits a crap descender like me, good visibilty, wide road little need to brake. It's been a while since I was on it but the descent back to Rippendon from Blackstone Edge resevoir is a good one, I'm going to go home that way a few times this year. My fave in those parts is the climb from Denshaw up to Buckstones which features on my Long Pennine Climbs ride, as does Cragg Vale. In planning that route I had a hard time choosing the climbs and descents, they are all good round there.