The major speedway nations in Europe are the United Kingdom, Sweden, Poland and Denmark. These countries run a number of leagues and have regular fixtures throughout the traditional speedway season that runs from March to October. On a smaller scale, competitions are also held in Argentina, Australia, Czech Republic, Italy, Russia, Slovenia and the United States. Some countries' top divisions feature highly paid star riders. In smaller countries and lower divisions, riders may be part-timers with a second job, or amateurs.