The BetMGM 300 is an annual 300-mile (482.803 km) NASCAR Xfinity Series race held at the Charlotte Motor Speedway in Concord, North Carolina during Memorial Day weekend as a support race for the Coca-Cola 600.

The race's origins trace back to 1978, when a it was a NASCAR Late Model Sportsman Series race was held the day before the World 600.

[2] From its inception through 2004, the race was scheduled for Saturday afternoon.

In 2015, the race's broadcast was transferred to Fox NASCAR after the departure of the NASCAR on ESPN content, allowing both of the races in Charlotte (the 300 on Saturday, and the 600 on Sunday) to air on Fox.

In 2024, BetMGM, a sports betting and online gaming platform jointly owned by MGM Resorts International and Entain, became the new title sponsor of the race.