The Arc Trial, currently known for sponsorship purposes as the Dubai Duty Free Legacy Cup, is a Group 3 flat horse race in Great Britain open to horses aged three years or older. It is run at Newbury over a distance of 1 mile, 3 furlongs and 5 yards (2,217 metres), and it is scheduled to take place each year in September.The event was established in 1997, and the inaugural running was won by Posidonas.