Festival racers are the NPC cars you will encounter while free roaming on the streets of Colorado. They are easy to identify as they have the racer’s name above the car. To challenge them you need to drive up behind their car until the challenge option appears. The class of car you are driving and the car they are driving will determine the difficulty. So it may be best to attempt this in a higher class car and only engage slow/ lower class cars.
Either way once the challenge option appears, press
to begin the race.
The route will be highlighted on you HUD map but it is also a good idea to check your overall map as sometimes the highlighted route may not be the most effective route to take. Once you have beaten your 10th racer, the achievement will unlock. To make this easier, only engage ‘easy’ racers and turn on all assists.