Choose one, or the other, or both.
First: 7:30am at 13th Street Coffee, Downtown Omaha. We roll north to Ponca and back. 30 miles.
Second: 10:00am at Blue Line in North Downtown. We roll to Council Bluffs to the Lincoln Monument and then back via Manawa. 25 miles.
Road bikes are probably fine, but there might be some gravel.
7:30 am ride: http://ridewithgps.com/routes/2260708
10:00 am ride: http://ridewithgps.com/routes/2260633
I'll update the comments here if the timing gets off.