International GT Calendar
ENDURANCE
International GT Calendar
2026
26.02/01.03.2026 Sebring International Raceway/USA
12/15.03.2026 Road Atlanta/USA
21/23.05.2026 Lime Rock Park/USA
11/14.06.2026 Mid-Ohio Sports Car Course/USA
25/28.07.2026 Road America/USA
17/19.07.2026 Watkins Glen International/USA
17/20.09.2026 Virgina International Raceway/USA
02/04.10.2026 Laguna Seca/USA
16/18.10.2026 Barber Motorsports Park/USA
05/08.11.2026 COTA/USA
International GT
International GT is a North American racing series that includes three different championships for late model Porsche and Ferrari competitors. Home primarily to sportsman drivers, with the occasional professional driver/coach joining the action in endurance races, International GT annually presents the Stuttgart Cup, Mission Foods GT3 Cup Trophy and The Maranello Cup championships.
The Stuttgart Cup includes Cayman 3.4, 3.8 and 4.0 liter cars. The Mission Foods GT3 Cup Trophy features Porsche GT3 cars from the last decade. The Maranello Cup includes Ferrari Challenge spec cars. All classes within these categories are based on engine displacement and compete for season-long championships. International GT also includes an Exhibition category for other marques of GT3 and GT4 race cars.
With rare exception, all International GT categories will compete on track at the same time for individual class honors in their own and exclusive IGT group. Most race weekends feature a minimum of one enduro (typically 60-minutes) and three sprint races all contributing to the season’s points championship.
All race weekends are part of the SVRA (Sportscar Vintage Racing Association) SpeedTour events. In addition to SVRA, the SpeedTour events often include Trans Am and Formula 4 Series championship racing.

