The United States Grand Prix West was a Formula One motor race held at street circuit in Long Beach , California . It was a Formula 5000 race in 1975 , and a F1 world championship event from 1976 to 1983 . The United States Grand Prix West was a race held at Long Beach , California , as a Formula 5000 race in 1975 and a Formula One world championship event from 1976 to 1983 .