 Caesars Palace Grand Prix was founded on 5 September 1971 . 18 from 18 nations competed in  Caesars Palace Grand Prix . late October or early November was when it was held . Melbourne (since 1972) were the venues of  Caesars Palace Grand Prix . The sport has the official site chicagomarathon.com . 18 events were there in  Caesars Palace Grand Prix
 Caesars Palace Grand Prix was started on 5 September 1971