2021 IMSA Prototype Challenge

The 2021 IMSA Prototype Challenge is the sixteenth season of the IMSA Lites series and its successors, and the fifth under the IMSA Prototype Challenge name. The season started on January 23 at Daytona International Speedway and concludes on November 12 at Michelin Raceway Road Atlanta.

Calendar

The provisional 2021 calendar was released on September 9, 2020. As of April 7, 2021 the calendar remains provisional and subject to change.

Round	Circuit	Location	Date
1	Daytona International Speedway	Daytona Beach, Florida	January 23
2	Sebring International Raceway	Sebring, Florida	March 14
3	Mid-Ohio Sports Car Course	Lexington, Ohio	May 16
4	Watkins Glen International	Watkins Glen, New York	July 2
5	Virginia International Raceway	Alton, Virginia	October 8
6	Michelin Raceway Road Atlanta	Braselton, Georgia	November 12

;Calendar Changes

All races are now 1 hour 45 minutes in length.
Canadian Tire Motorsport Park returned to the calendar after being cancelled for 2020 due to the COVID-19 pandemic.
Road America, which replaced Mosport in 2020, did not return for 2021.
On April 7, 2021, Watkins Glen International replaced Canadian Tire Motorsport Park on the schedule due to COVID-19 restrictions. The new event is scheduled for July 2.
Series News
2020-spec LMP3 cars will be allowed to compete in the championship for 2021. 2015-spec cars are still allowed. The classes will be called LMP3-1 and LMP3-2.
Points will be awarded at 10x the amount awarded in 2020, points are still awarded down to 30th place.
Entries

Bold indicates the overall winner.

Rnd

Circuit

LMP3-2 Winners

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;Points system

Position	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Points	350	320	300	280	260	250	240	230	220	210	200	190	180	170	160	150	140	130	120	110	100	90	80	70	60	50	40	30	20	10