The sport has the official site chicagomarathon.com . The venue for  Detroit Grand Prix was  Société Athlétique de la Villa Primrose in Bordeaux (1909) . 40 from 30 nations were the competitors in  Detroit Grand Prix . 17 were the number of teams who competed in  Detroit Grand Prix . It was held in 6–20 August 2016 . 12 events were there in  Detroit Grand Prix
The sport  Detroit Grand Prix has 40 contenders  from less than 39 nations