2021 IndyCar Series - Wikipedia
https://en.wikipedia.org/wiki/2021_IndyCar_SeriesOn October 1, 2020, a seventeen-race calendar was announced. Iowa Speedway did not return from the 2020 IndyCar Series calendar, while all tracks that were unable to host races in 2020 due to the COVID-19 pandemic returned to the calendar with the exception of Circuit of the Americas and Richmond Raceway. A second road course race at Indianapolis was held once again, as part of a doubleheader on Brickyard weekend in August.
2021 IndyCar Series - Wikipedia
en.wikipedia.org › wiki › 2021_IndyCar_SeriesThe 2021 NTT IndyCar Series was the 26th season of the IndyCar Series and the 110th official championship season of American open wheel racing. The premier event was the 2021 Indianapolis 500, won by Hélio Castroneves ( Meyer Shank Racing ). It was the second year under Penske management after they took over in late 2019.