IMSA unveiled the 2027 WeatherTech SportsCar Championship schedule while also confirming plans for expanded, series‑sanctioned testing.
The announcement, made at Sebring International Raceway as part of the traditional calendar‑release event, signals a deliberate effort to balance continuity with deeper preparation time for the premier endurance events that define the series.
For teams, manufacturers, circuits and fans, the 2027 slate and the proposed testing regime represent both a known roadmap and a subtle recalibration of how the championship will be contested over the next 12 months.
The 2027 IMSA WeatherTech SportsCar Championship will once again feature an 11‑race schedule, with the same venues and the same event order as recent seasons, a decision that underscores IMSA’s preference for stability in a rapidly evolving global sports‑car landscape.
The four‑class structure—GTP, LMP2, GTD PRO and GTD—remains unchanged, preserving the depth and diversity that make the WeatherTech Championship one of the most compelling series in North American motorsport.
What distinguishes the 2027 cycle from previous years is IMSA expanded testing program, which will see series‑sanctioned tests held at each of the five tracks that host Michelin Endurance Cup events.
The plan, announced in parallel with the calendar release, calls for five official tests in advance of the endurance rounds with the first already scheduled for December 11–13 at Daytona International Speedway.
This “Roar Before The Rolex 24”‑style test will be followed by additional sanctioned dates at Sebring International Raceway, Watkins Glen International, Road America, and Michelin Raceway Road Atlanta, though the exact months and configurations for the tests are yet to be finalized.
Crucially, the IMSA expanded testing program will only be available to active WeatherTech Championship competitors and will not be mandatory, giving teams the flexibility to choose how deeply they engage with the additional track time while still ensuring that all participants have access to a standardized proving ground.
Full 2027 IMSA SportsCar Championship calendar
| Round | Race | Venue | Date |
|---|---|---|---|
| – | Roar Before The Rolex 24 | Daytona International Speedway | January 22-24 |
| 1 | Rolex 24 At Daytona | Daytona International Speedway | January 28-31 |
| 2 | Sebring 12 Hours | Sebring International Raceway | March 17-20 |
| 3 | Grand Prix of Long Beach | Long Beach Street Circuit | April 16-17 |
| 4 | Grand Prix of Monterey | WeatherTech Raceway Laguna Seca | April 30 – May 2 |
| 5 | Detroit Grand Prix | Detroit Street Circuit | June 4-5 |
| 6 | 6 Hours of The Glen | Watkins Glen International | June 24-27 |
| 7 | Chevrolet Grand Prix | Canadian Tire Motorsport Park | July 9-11 |
| 8 | Road America 6 Hours | Road America | July 29th – August 1st |
| 9 | VIR GT Challenge | VIRginia International Raceway | August 20-22 |
| 10 | Indy Battle on The Bricks | Indianapolis Motor Speedway | September 17-19 |
| 11 | Petit Le Mans | Road Atlanta | October 6-9 |
