7000 ft climbimg over 100 km is going to be demanding.
By coincidence I have just come back from a couple of days in the Peak district. Its not called the peak district for nothing but the roads seem to make good use of the contours and nothing horrendously steep.
Coming down the A54 from the Cat and Fiddle road towards Congleton was great. nice surface and some fast descents.
It is WORSE ( more pleasant with better views ) than the Sequoia Century 200, organised by the Western Wheelers, Palo Alto.
That ride has bugger-all views for 120 miles except endless pine trees and mountain switchbacks.
If you want to tackle the 10,600 ft of climbing, there might be a reward when the route overlooks San Gregorio naturist beach.