Petaluma Speedway patrons and competitors please note that there are two upcoming schedule changes. The Larsen Racing Products IMCA Modifieds will not compete on Sept 12th due to the IMCA Super Nationals being held. The Modifieds have been added to the Sept 26 Civil War Event. Also the Larsen Racing Products Dwarf Cars have been removed from the Sept 26 date due to the two-day Dwarf Car Nationals Event being held at Marysville Raceway Park that weekend.