Save The Event For Later O'Fallon Grand Prix Omnium O Fallon, IL, Fri Jun 14 - Sun Jun 16, 2013 Who's Registered? | Contact Event | Event Website | Google Calendar Start line address: O Fallon, IL 62269 Presented by Metro East Cycling USA Cycling Permit # 2013-628 This is a past event. If you wish to see the details for this past event click "Continue" below. If you are looking for a current event, please search the event calendar .