iRacing 2026 Season 4 Week 1: Bristol, Britcar 24, and new Track Day series

iRacing has launched Season 4 of 2026 with a full slate of racing across multiple disciplines from September 15th to 21st. The week marks the start of a new competitive season featuring NASCAR, dirt oval racing, and endurance events alongside newly introduced series and formats.

The headline special event is the iRacing Britcar 24 presented by Cosworth, which brings the historic 24-hour endurance race to the virtual platform. Originally established at Silverstone in 2005, the real-world Britcar 24 has featured everything from GT machinery to touring cars and club racers. The iRacing version will run GT3 and GT4 machinery through a full day-night cycle at Silverstone.

In the weekly championship series, the NASCAR iRacing Series continues its 36-week campaign at Bristol Motor Speedway (Week 29), with races scheduled across multiple time slots in both fixed and open setup formats. The Dirt 410 Sprint Car Tour reaches Week 30 at Lucas Oil Speedway, while the Dirt Super Late Model Tour contests Week 32 at Knoxville Raceway. Additional oval series include the NASCAR Modified Tour at Concord Speedway and the Super Late Model Tour at Lanier National Speedway.

New for 2026 Season 4 is the FIA Cross Car Championship at Rookie level, introducing mixed-surface rallycross racing in the nimble FIA Cross Car. iRacing has also debuted a Track Day series at Summit Point Raceway, featuring multiclass racing with a variety of road cars including Porsche 911 GT3 Cup, Mazda MX-5, Caterham 420R, TCR machinery, and the Radical SR8. Open qualifiers run every 30 minutes.

Regional GT3 and FIA F4 tours continue with hourly splits across Americas, Asia-Pacific, and Europe regions. Specialty series include Ring Meister at the Nürburgring Nordschleife (this week featuring the Caterham 420R), Draft Master Challenge by SIMAGIC at Talladega, and Rain Master Challenge by Podium1 for wet-weather GT3 racing at Summit Point.