I had already posted this elsewhere, but in the interest of keeping Northeast centuries in one place (thanks Spazz!) I'll add it here too.

The Granite State Wheelmen have an awesome century the weekend of September 24th & 25th. It runs along the New Hampshire & Maine coast, and it's interesting in that you can sign up for Saturday, Sunday, or both. (The same rides are offered both days.) The other thing that I really like about it is that there aren't mass start times. You can start the ride at anytime - I think after 7 in the morning - as long as you are done by 5. I wasn't able to ride this one last year, but I have done it a couple of times, and I think I'll ride it this year too.

If you're interested, the information page (and link to registration) can be found at http://www.granitestatewheelmen.org/...C-HomePage.htm.