The Bluegreen Vacations Duel, formerly known as the Twin 125s, is a NASCAR Cup Series preliminary event to the Daytona 500 held annually in February at Daytona International Speedway. It consists of two 150-mile (240 km) races, which both serve as a qualifying race for the Daytona 500. The finishing order in the two 150-mile (240 km) races, held on the Thursday before the Daytona 500, determine the starting lineup for the Daytona 500 held on race day.