Posted: 23/10/2013 at 21:55
Chimney - keep an eye out for the Grindleford Gallop, it's usually March but entries open soon and it fills up quick. Not done it, but it's 21m from Grundleford to Bakewell via Eyam and Great Longstone and back via Chatsworth and Curbar Edge etc. could be just what you are looking for.
long Tour of Bradwell is another - 30 miles? Also, the Rab Mini Mountain Marathons are good fun, 4 hours navigating around the peaks, dark and white peak organise them. The 3 Peaks sound like your kind of event also.