This achievement is earned through natural progression in the Showdown Tour mode. If you play every event in the Pro and AllStar tiers, the first opportunity to unlock it will appear in the Champion tier, 2nd row, 4th event - the Race Off in Baja California.
The full list of locations are as follows:
Miami
San Francisco
Yokohama
Nevada
Colorado
Michigan
Los Angeles
Battersea
Tokyo
Baja California