Can anyone offer a comparison between this and the Greensands Marathon? I did the Greensands last October, in just over 4:30. It was great fun, but thanks to the 70 minute cut-off to get up Leith Hill, I set off too fast, and ended up with a massive positive split of 2:00 for the first half, and 2:30 for the second half. My Garmin recorded climb/descent of a bit over 3,000 feet for Greensands, so on paper the races look pretty similar.
I would be interested in anyone's thoughts on how the two compare, so that I can try and pace this one better.