Endurance
IMSA GTD
North America's premier GT3 class, racing in endurance events including the Rolex 24 at Daytona and 12 Hours of Sebring.
North America·Est. 2014·IMSA
// Overview
The IMSA GTD class runs within the WeatherTech SportsCar Championship alongside GTD Pro, GTP prototypes, and LMP2 on the same grid.
Five of the season's eleven rounds form the Michelin Endurance Cup, headlined by the Rolex 24 at Daytona and 12 Hours of Sebring. The remaining rounds are shorter sprint-format events at circuits across the USA and Canada.
In 2026, fourteen full-season entries compete across fourteen different teams, with additional Endurance Cup-only entries from Manthey Racing and others. The Pro-Am rule mandates at least one Bronze or Silver FIA-graded driver in every GTD car.
// Quick facts
- Organiser
- IMSA
- Founded
- 2014
- Region
- North America
- Format
- Endurance
- 2026 Rounds
- 11