IRVINE, Calif. (December 20, 2017) – Mazda announced the 2018 Battery Tender Global Mazda MX-5 Cup presented by BFGoodrich Tires schedule today. The schedule features four INDYCAR weekends, including a return to the popular Portland International Raceway, in Portland, Oregon, for the first time since 2008. The championship season will conclude in October at the Monticello Motor Club, just 90 minutes from New York City.