iR
iRacing Calendar2026 Season 1
Back to all series

IMSA Sportscar Endurance Challenge

Sports Car
6 weeks
Week 5 active
Car: Ligier JS P320, Ford Mustang GT4, Mercedes-AMG GT4, BMW M4 G82 GT4

Season Timeline

Week 1Week 6

Full Schedule

1

Circuit de Spa-Francorchamps - Bike

Dec 20 — Dec 26

65°F/18°C, Rain chance 31%, Grid by class, Rolling start, Local enforced cautions, Qual scrutiny - Moderate. FMGT4: fuel: 80% MGT4: fuel: 80% BMWGT4: fuel: 80% AMV4: fuel: 80% P718: fuel: 80% M570S: fuel: 80% mins

2

Oulton Park Circuit - International

Jan 3 — Jan 9

66°F/19°C, Rain chance None, Grid by class, Rolling start, Local enforced cautions, Qual scrutiny - Moderate. FMGT4: fuel: 80% MGT4: fuel: 80% BMWGT4: fuel: 80% AMV4: fuel: 80% P718: fuel: 80% M570S: fuel: 80% mins

3

Circuit Gilles Villeneuve

Jan 17 — Jan 23

65°F/19°C, Rain chance None, Grid by class, Rolling start, Local enforced cautions, Qual scrutiny - Moderate. FMGT4: fuel: 80% MGT4: fuel: 80% BMWGT4: fuel: 80% AMV4: fuel: 80% P718: fuel: 80% M570S: fuel: 80% mins

4

Miami International Autodrome - Grand Prix

Jan 31 — Feb 6

81°F/27°C, Rain chance None, Grid by class, Rolling start, Local enforced cautions, Qual scrutiny - Moderate. FMGT4: fuel: 80% MGT4: fuel: 80% BMWGT4: fuel: 80% AMV4: fuel: 80% P718: fuel: 80% M570S: fuel: 80% mins

5

Portland International Raceway - Full Circuit

Feb 14 — Feb 20

66°F/19°C, Rain chance 31%, Grid by class, Rolling start, Local enforced cautions, Qual scrutiny - Moderate. FMGT4: fuel: 80% MGT4: fuel: 80% BMWGT4: fuel: 80% AMV4: fuel: 80% P718: fuel: 80% M570S: fuel: 80% mins

6

Mount Panorama Circuit

Feb 28 — Mar 6

68°F/20°C, Rain chance None, Grid by class, Rolling start, Local enforced cautions, Qual scrutiny - Moderate. FMGT4: fuel: 80% MGT4: fuel: 80% BMWGT4: fuel: 80% AMV4: fuel: 80% P718: fuel: 80% M570S: fuel: 80% mins