Blood Sweat & Gears

DH is in on the century, and I'm in on the 50. I've been saying that I was going to do it for several years, and it's finally time. The century sold out in less than a day. There are still 50 slots open, but I wasn't sure that they would be for long, so I took the plunge.

Now - training. All suggestions for how to train for very steep mountains where there aren't very steep hills welcome