You need to collect 23 Career Flags to unlock Quick Race mode. This feature can be accessed from the game's main menu. Quick Race is a series of 42 select tracks where you can race solo, both in online and offline modes.
Practice your driving skills, become a legendary racer, and break your own records in Quick Race mode! You can get accustomed to the tracks and learn secret pathways to come out on top in Multiplayer mode! The tracks are progressively unlocked in Quick Race as you complete the challenges linked to each map in Career mode. There are no currency rewards for Quick Races.