NEWTON, Iowa (AP) — The Iowa Speedway will again host two NASCAR Nationwide and truck series races and an IndyCar event in 2013. The track released its tentative schedule on Wednesday. It includes Nationwide series races during the weekends of June 8 and August 3. The track will host truck races during the weekend of July 13 and Sept. 8, and the IndyCar series will run in Newton in late June. Iowa Speedway CEO Doug Fritz says the exact dates for all those races will be announced at a later date.