The 2021 NAPA Auto Parts 150 was a ARCA Menards Series West race held on August 21, 2021.
It was contested over 153—extended from 150 laps due to an overtime finish—laps on the .50-mile (0.80 km) short track oval.
It was the fifth race of the 2021 ARCA Menards Series West season.
Bill McAnally Racing driver Jesse Love, collected his second win of the season.
Pedroncelli collected the pole with a time of 18.424 and a speed of 97.699 mph (157.231 km/h).