Posted: 08/02/2016 at 11:42
MyFitnessArena - I've heard great things about Berkhamsted from a few people, I might add that to my to do list this year.
PeggyG - you are right, what comes up must come down and there certainly where some nice downhill parts as well. I did track it with my TomTom and that came up with 13.4 miles. Last year (the same route) my Timex came up with 13.2 miles if that helps as well