the 2004 pop secret 500 was a nascar nextel cup series stock car race held on september 5, 2004 at california speedway in fontana, california. contested over 250 laps on the 2-mile (3.23 km) asphalt d-shaped oval, it was the twenty-fifth race of the 2004 nascar nextel cup series. elliott sadler of robert yates racing won the race.