Off Road Big Rigs was the fifteenth episode of the fourth season of Top Gear USA. The episode saw the show's hosts, Adam Ferrara, Tanner Foust, and Rutledge Wood, becoming amateur logging truckers in Washington. The episode premiered on the the 1st of July, 2014. The episode is somewhat of a continuation of an earlier episode of the show titled Big Rigs, which aired as part of the show's second series.
Adam, Tanner, and Rutledge are sent to a remote location in Washington to try their hand at driving logging trucks. They are challenged to each transport a full-load of logs from the forest to a nearby mill. First, they must complete a series of challenges including a drag race and a test of their perceptions of the width of their trucks.