Single Day tickets on sale now for the BITNILE.COM Grand Prix of PortlandAug. 23-25 NTT INDYCAR SERIES weekend features 10 total races from five series PORTLAND, Ore. (July 16, 2024) – Single Day tickets for the 2024 BITNILE.COM Grand Prix of Portland, the annual NTT INDYCAR SERIES race weekend at Portland International Raceway (PIR), are