Dover International Speedway is a NASCAR-sanctioned race track located in Dover, Delaware, owned by, and serving as the corporate headquarters of, Dover Motorsports, Inc. It is co-located with a harness racing track, Dover Downs, and shares the complex with Dover Downs Hotel & Casino.

In February 2002, Dover Downs Entertainment changed its name to Dover Motorsports following the spin-off of its gaming operations to its existing shareholders. As a result, the name of the track was changed from Dover Downs International Speedway to Dover International Speedway. Dover Motorsports, Inc. continues to maintain its corporate headquarters at the racetrack.

The racetrack is home to the second race in the "Chase for the NASCAR Sprint Cup" and will celebrate its 40th anniversary during the 2008 season.

Dover is unique in many ways. It is exactly one mile long; technically this means that it is neither a superspeedway nor a short track. The speedway surface is concrete; most NASCAR track surfaces are asphalt. The concrete surface is notoriously hard on cars, bringing about its nickname of The Monster Mile.

At one time the Winston Cup races held here were 500 miles long until a NASCAR rules change limited 500-mile races to being held only at tracks over a mile in length; the current Sprint Cup races here are 400-miles in distance.

The speedway's mascot is called "Miles the Monster" which is a concrete monster spawned from the track's nickname, "The Monster Mile." The monster is featured on the winner's trophy he track's tickets, memorabilia, website, and more. A previous nickname that the track had was the "White Lightning."

The winner of each race is asked to sign the seat number that matches their respective car number in the Monster Bridge, located near Turn 3. Martin Truex Jr. most recently signed his seat during the Sept. 21-23, 2007 race weekend.