The 2003 Sirius Satellite Radio at The Glen was the 22nd stock car race of the 2003 NASCAR Winston Cup Series season and the 18th iteration of the event.

The race was held on Sunday, August 10, 2003, before a crowd of 100,000 at the shortened layout of Watkins Glen International, a 2.454 miles (3.949 km) permanent road course.

It was long known around the world as the home of the Formula One United States Grand Prix, which it hosted for twenty consecutive years (1961–1980), but the site has been home to road racing of nearly every class, including the World Sportscar Championship, Trans-Am, Can-Am, NASCAR Sprint Cup Series, the International Motor Sports Association and the IndyCar Series.

The circuit's current layout has more or less been the same since 1971, although a chicane was installed at the uphill Esses in 1975 to slow cars through these corners, where there was a fatality during practice at the 1973 United States Grand Prix.

[2] Tony Stewart of Joe Gibbs Racing would set the fastest time in the session, with a lap of 1:12.050 and an average speed of 122.415 miles per hour (197.008 km/h).