You must create tracks in the Canyon, Valley, Lagoon, and Stadium environments.
Select the Trackbuilder option from the main menu and choose "Create Your Own Tracks."
The next screen will show you the four environment options. Only tracks created in Advanced, Normal, or Beginner modes will count towards this achievement. After you enter one of these modes, create anything you want so long as it contains a starting point, a finish line, and a podium.
If you do not possess one of these items, the game will not allow you to validate or save the track. Once you've built the core components, press
and select "Validate" which will force you to test drive the track. After completing that race, save the track and repeat the process for the remaining three environments. As the track is saving in the fourth environment, the achievement should pop.
Edit: Fgnz DeBroin has said you do not need to place a podium in order to save your track. The game may occasionally tell you that you need to place one, but apparently is not mandatory.
Edit: xSTAGGERxLEEx has found you don't need to validate the track, simply press the
button and save it as a new track.