That sounds like Rowsley Bar, you should have tried Riber Road, that's tough! There's some steep stuff around Matlock Bath as well, we avoid the daft ones, but Riber is good fun! Via Gellia is a good long ( 7 miles) steady climb, some nasty alternatives to get to same place. When you ride this terrain all the time it certainly gets you ready for hills. Darley Forest place has some flats around it on the tops, it's where I head for interval work cos there is really nothing else flat unless you ride the A6 to Bakewell. Great riding terrain, we did Winnats on club ride today.