As I read through the replies I can't believe what great advice you are getting. I like that you have found support and a rider group. That makes it alot easier.

The best plan is to listen to your body as you ride and then adjust the plan, nutrition and/or bike when you finish that day's ride. If you sign up for your first century and your body tells you "maybe" then you might enjoy the half century that day.

It sounds like you will be ready for your scheduled September ride. You might come to California for a great charity ride August 21, 2010 that is just north of San Francisco, near Petaluma: Holstein Hundred Charity ride for West Marin Senior Services. It has rolling hills and a 35 and 65-mile route which might be manageable. The century has 6000 ft. up and down along the picturesque coast.

Keep up the good work, no, I mean fun!