Mazda Road to Indy Presented by Cooper Tires Support Series Races Add to the Weekend Excitement Photo Courtesy: INDYCAR PORTLAND, Ore. (April 17, 2018) – Green Savoree Racing Promotions (GSRP) is excited to announce that tickets are on sale today effective 10:00 a.m. PT for the Grand Prix of Portland at portlandgp.com….
