For Cincy check the Cincinnati Cycle Club.
Here's a link to their national rides. http://www.cincinnaticycleclub.org/e...ational-rides/
I've done the Spring Opener, ACACAC Tour and the Chili rides. All very well run rides.
Here's a link to the Ohio Bicycle Events Calendar. http://www.ohiocycling.info/obec.html
Good rides in the Dayton/Troy area are the Troy Strawberry Festival-6/7 and the Vandalia Freedom Tour-7/4
Have fun, the Cincy and Dayton areas are great places to ride.