If testing, torturous steep climbs are what you’re after, here are ten that will get your leg muscles straining just reading about them. The upside to struggling to the top of these summits though is of course the magical views that await you (if you’re not too tired to notice).
From short climbs in Cumbria to absolutely epic climbs in Hawaii, none of these are easy but some certainly require less training than others.
Training plans to help you get to the top of most of these routes are available on Climb By Bike.