Dover International Speedway (nickname: The Monster Mile) is a NASCAR race track located in Dover, Delaware, owned by, and serving as the corporate headquarters of, Dover Motorsports. It is unusual in several respects. It is a concrete track while most NASCAR tracks are asphalt. It is co-located with a horse racing track, Dover Downs, and in fact is sometimes also referred to by this name. It is also exactly one mile long; technically this means that it is neither a superspeedway nor a short track. The speedway is also notoriously hard on cars, bringing about its nickname of The Monster Mile. The horse track is part of an extensive entertainment complex including other forms of gambling; at one time both it and the speedway were owned by the publicly traded Dover Downs Entertainment, but they have since been split into two separate enterprises, partly at the encouragement of NASCAR. 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 Nextel Cup races here are 400 miles long. Dover also hosted Indy Racing League races in 1998 and 1999 won by Scott Sharp and Greg Ray.