One of my favourite runs in the Peak District is the trail run from Ladybower Reservoir to the top of Win Hill.
It rises 280 metres in just over 3km on good terrain. It is never too steep to force you to walk and so is a great training run. The views from the summit are probably the best in the Peak District and from the top you can carry on westwards to Kinder, drop south west towards Hope to climb its twin; Lose Hill or even retrace your steps and add another couple of hill reps!
Come with me on a video tour and see one example of what makes the Peak District such a fantastic location for trail running.