The 30 miler in NC that you mention...is that le Tour De femme in Oct? I am thinking about doing that also. Our LBS (i am in NC) is hosting a weekly training ride for it and they have a beginner group. Does your LBS do group rides? If they do, ask if they will do a beginner ride. I've found it a great way to build my endurance after sitting all winter I also found an article in my Weight Watcher's magazine, which unfortunately i can't find on line, that gives a schedule for training for a 35 mile ride. Basically ride 4 times a week, starting around 30 minutes, and build up a little every week. if i can find the link i will post. Good luck!