what locations have all the forza horizons games taken place

Here are the main locations where the Forza Horizon games have taken place:

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Game	Setting
Forza Horizon	Colorado, USA
Forza Horizon 2	Southern France and parts of Northern Italy
Forza Horizon 3	Australia
Forza Horizon 4	United Kingdom
Forza Horizon 5	Mexico
Forza Horizon 6	Japan

A simple way to remember it: the series has moved from the U.S. to Europe, then Australia, back to Europe, then Mexico, and now Japan.

Game-by-game

• FH1: Colorado, USA.

• FH2: Southern France and Northern Italy.

• FH3: Australia.

• FH4: United Kingdom.

• FH5: Mexico.

• FH6: Japan.

Note

Some fan discussions describe the earlier games more broadly by region rather than exact map boundaries, but the list above matches the commonly cited settings from recent sources.

TL;DR: Colorado, France/Italy, Australia, the UK, Mexico, and Japan.