The 2008 United States Olympic trials for track and field were held at Hayward Field in Eugene, Oregon. Organised by USA Track and Field, the ten-day competition lasted from June 27 until July 8 and served as the national championships in track and field for the United States.

The USA Track & Field Outdoor Championships is an annual track and field competition organized by USA Track & Field, which serves as the American national championships for the sport. Since the year 1992, in the years which feature a Summer Olympics, World Athletics Championships, Pan American Games, NACAC Championships, or an IAAF Continental Cup, the championships serve as a way of selecting the best athletes for those competitions.