2021 IMSA Monterey Grand Prix

The race was held at WeatherTech Raceway Laguna in Monterey, California on September 12, 2021.

Originally scheduled to run on April 25, 2021, the race was set to wrap up the two "West Coast Swing" rounds also consisting of Long Beach, however the event was postponed to September 12, 2021, due to the ongoing COVID-19 Pandemic in California.

[3] In LMP2, Mikkel Jensen and Ben Keating led the Drivers' Championship with 1442 points, ahead of Tristan Nunez and Steven Thomas.

[3] With 1930 points, the GTD Drivers' Championship was led by Bill Auberlen and Robby Foley, ahead of Roman De Angelis and Ross Gunn.

[5] Grasser Racing Team was absent from the event due to a clash with the ADAC GT Masters round at Lausitzring.

[7][8] There were two practice sessions preceding the start of the race on Sunday, one on Friday and one on Saturday.

[9] The first practice session took place at 4:30 pm PT on Friday and ended with Filipe Albuquerque topping the charts for WTR-Konica Minolta Acura, with a lap time of 1:14.880, ahead of Pipo Derani in the No.

[12] The second and final practice session took place at 8:45 am PT on Saturday and ended with Harry Tincknell topping the charts for Mazda Motorsports, with a lap time of 1:14.552.

1 Paul Miller Racing Lamborghini Huracán GT3 Evo of Madison Snow, with a lap time of 1:24.237.

[21] Ross Gunn set the fastest time in the GTD points paying session driving the No.

However, the team were sent to the back of the GTD grid after Gunn exited the car before the session ended.

55 Mazda was demoted to the rear of the DPi field for the camber of the car exceeding the maximum permitted a post-qualifying technical inspection.

[31] The result kept Antonio García and Jordan Taylor atop the GTLM Drivers' Championship.

[31] As a result of winning the race, Robichon and Vanthoor advanced from third to second in the GTD Drivers' Championship.