The official site of  Detroit Grand Prix is chicagomarathon.com . 6–20 August 2016 was when it was held .  Société Athlétique de la Villa Primrose in Bordeaux (1909) were the venues of  Detroit Grand Prix . 40 from 30 nations were the competitors in  Detroit Grand Prix . The no. of events in sport was 12 . 17 teams competed in  Detroit Grand Prix
The sport  Detroit Grand Prix has 46 contenders  from more than 40 nations