Dirt track racing is a type of auto racing performed on clay or dirt surfaced oval tracks in Australia. The seasons tend to be from September to April. There are a large number of tracks available Australia wide, with some of the most popular ones being Perth Motorplex, Bunbury Speedway, Speedway City, Premier Speedway Warrnambool (Sungold Stadium) and Sydney Speedway (trading as Valvoline Raceway). The richest and best known Speedway series in Australia is the World Series Sprintcars. The series was conceived by Adelaide based sedan driver and promoter John Hughes in 1986 as an Australian version of the famous World of Outlaws (WoO) series run in the United States since 1978. The most recent season was the 2014–15 World Series Sprintcars season.
There is also a single meeting Australian Sprintcar Championship which is run over 12 rounds during the Australian Speedway season (as of 2013–14). The Australian Sprintcar Championship has been contested every year since 1963. Only open to Australian Sprint Car drivers, the Championship is for winged 410ci cars. It is contested at a different track each season, on a state-by-state rotational basis. The 2015 Championship was held at Western Australia's Bunbury Speedway. The 2016 title will be held at Victoria's Premier Speedway. The most successful driver of the Championship's history is Garry Rush with 10 wins. Another popular annual event is the Australian Super Sedan Championship.
The composition of the dirt on tracks has an effect on the amount of grip available. Tracks can be composed of any of the following materials; clay, dirt, sand, Dolomite, crushed granite and crusher dust. Some tracks are also banked or semi-banked, although most are flat. The Ultimate Sprintcar Championship (USC) recently announced a new television show which will be broadcast on 7mate, which is the most comprehensive free-to-air deal in the history of a few premier Sprintcar venues. It will run from early November 2015 until the end of April 2016. The new program will be known as "Ultimate Sprintcar".