To unlock the Farewell Drift trophy in Days Gone, you will need to accumulate a total of 10 minutes of drifting on your motorbike.
You can, of course, do this naturally as you play by pressing
in the direction you wish to turn.
If you want to do this in one go and get it out of the way with, you can perform a donut and keep spinning in a circle with your front wheel locked in place.
You can find a video showing a good spot and the method needed below (credit to PowerPyx on YouTube):