Mike, I know you've signed up already, but others may not know of the NEW Rock Island Ramble Century planned for June 22nd.
We're planning a 7:30am start and 5:00pm closure, which is 9.5 hours, but there is nothing stopping you from starting at 7:00am (except that you might get to some SAG Stops before they're quite open!).
http://RockIslandRamble.com
It is part of the Tour of KC:
http://TourOfKC.com