PDX Driver School & Club Trial PDX/CLUB TRIALS Bring your tuners, street cars and track toys to experience driving on the Shenandoah Circuit. Learn to drive your car safely at the limits of adhesion with an in car instructor. Classroom instruction and friendly atmosphere are included! Club Trials (Level 2) events are entry-level competition events. Club Trial entrants will be provided a classroom session and a drive-around the track prior to their initial runs.