Each continent within Track King contains one or more regions.
There is no difference between the regions within a continent - they are all equal and experience similar racing conditions over time, as well as similar Cup competitions. Additional regions may be added to a continent if the existing regions have reached their capacity.
Regional tracks are only used for Cup racing. Each Regional track is the 'hub' for 15 Local tracks, with each Local track hosting 150 stables that participate throughout the 6 different racing classes. (See Tracks and weather)
Although the other stable managers at your local track are your direct opponents, don't forget that you may sometimes need to band together as track representatives to compete against other tracks - or even other regions or continents - in very prestigious Cup competitions. After all, when a horse makes a name for itself on the big stage, the punters and media are bound to want to know about the place it came from.