DuraMAX Texas Grand Prix Powered by RelaDyne is a race weekend at Circuit of The Americas in Austin, Texas. Circuit of The Americas is a purpose-built motorsports complex known for its roaring engines, twisting track and big-stadium energy. Fans can expect the sights and sounds of high-speed racing on one of the country's most famous circuits. Bring your racing-fan friends, pick a spot where you can watch the cars fly by and soak up the excitement of a true motorsports event.