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The 2020 ARCA Menards Series West was the sixty-seventh season of the ARCA Menards Series West, a regional stock car racing series sanctioned by NASCAR. It began on February 20 at the Las Vegas Motor Speedway Bullring with the Star Nursery 150, and ended on November 6 at Phoenix Raceway with the Arizona Lottery 100.
2020 marked the first season of this series under the ARCA banner.
When the season was put on hold due to the COVID-19 pandemic, drivers from all NASCAR series, including a few ARCA Menards series drivers, participated in the inaugural eNASCAR iRacing Pro Invitational Series during that time.