3 Shires Sportive ft/mile

Sure enough, checking previous sportive results reveals that the 3 Shires Sportive is the one I have done with the highest feet of ascent per mile. For the route I did, there were 139 feet of ascent per mile, on average. That probably explains why my average speed, 13.9 mph was lower than I would have expected. The Peak District, what can you do?