If you have any legs left after a long season, you need to check this "hundie" out. http://www.mattstegall.com/windrock100 This one is being put on by the guys at The Bike Zoo. So if you want to suffer some more, climb on board.
As for me, I have an excuse. I will be riding the Virginia Creeper trail with my daughter and a few girlfriends.
Hmmm ... perhaps next year.