Bakewell – Cromford on A6
Cromford – Newhaven on the Via Gellia (A5012)
Newhaven to Monyash on A515 then back to Bakewell
That way round its more of less a steady climb all the way to Monyash with a rolling section to the top of Bakewell. The other way round its a climb up to Over Haddon then more or less down hill back to the A6.
Not the most exciting ride but the only way to completely avoid hills is to ride to Derby & back.
The section of the A5012 between Cromford & Newhaven can be interesting if there are a lot of HGVs around (weekdays) but the rest is reasonable.